Index: Ringtoets/Piping/src/Ringtoets.Piping.Data/StochasticSoilModel.cs
===================================================================
diff -u -r11f0867b39150ae5fac83dc178a89fee46d27611 -r5e70f173b3839314912e086b6c1c784b975ee646
--- Ringtoets/Piping/src/Ringtoets.Piping.Data/StochasticSoilModel.cs	(.../StochasticSoilModel.cs)	(revision 11f0867b39150ae5fac83dc178a89fee46d27611)
+++ Ringtoets/Piping/src/Ringtoets.Piping.Data/StochasticSoilModel.cs	(.../StochasticSoilModel.cs)	(revision 5e70f173b3839314912e086b6c1c784b975ee646)
@@ -19,8 +19,11 @@
 // Stichting Deltares and remain full property of Stichting Deltares at all times.
 // All rights reserved.
 
+using System;
 using System.Collections.Generic;
+using System.Linq;
 using Core.Common.Base.Geometry;
+using Ringtoets.Piping.Primitives;
 
 namespace Ringtoets.Piping.Data
 {
@@ -70,6 +73,50 @@
         /// </summary>
         public List<StochasticSoilProfile> StochasticSoilProfiles { get; private set; }
 
+        /// <summary>
+        /// Updates the <see cref="StochasticSoilModel"/> with the properties
+        /// from <paramref name="fromModel"/>.
+        /// </summary>
+        /// <param name="fromModel">The <see cref="StochasticSoilModel"/> to
+        /// obtain the property values from.</param>
+        /// <exception cref="ArgumentNullException">Thrown when <paramref name="fromModel"/>
+        /// is <c>null</c>.</exception>
+        /// <exception cref="InvalidOperationException">Thrown when <see cref="StochasticSoilProfiles"/>
+        /// contains multiple <see cref="PipingSoilProfile"/> with the same 
+        /// <see cref="PipingSoilProfile.Name"/>, and <paramref name="fromModel"/> also contains a 
+        /// <see cref="StochasticSoilProfile"/> with the same name.
+        /// </exception>
+        public void Update(StochasticSoilModel fromModel)
+        {
+            if (fromModel == null)
+            {
+                throw new ArgumentNullException(nameof(fromModel));
+            }
+
+            Name = fromModel.Name;
+            SegmentName = fromModel.SegmentName;
+            Geometry.Clear();
+            foreach (var point in fromModel.Geometry)
+            {
+                Geometry.Add(point);
+            }
+            List<string> newNames = new List<string>();
+            foreach (var fromProfile in fromModel.StochasticSoilProfiles)
+            {
+                var sameProfile = StochasticSoilProfiles.SingleOrDefault(sp => sp.SoilProfile.Name.Equals(fromProfile.SoilProfile.Name));
+                if (sameProfile != null)
+                {
+                    sameProfile.Update(fromProfile);
+                }
+                else
+                {
+                    StochasticSoilProfiles.Add(fromProfile);    
+                }
+                newNames.Add(fromProfile.SoilProfile.Name);
+            }
+            StochasticSoilProfiles.RemoveAll(sp => !newNames.Contains(sp.SoilProfile.Name));
+        }
+
         public override string ToString()
         {
             return Name;
Index: Ringtoets/Piping/src/Ringtoets.Piping.Data/StochasticSoilProfile.cs
===================================================================
diff -u -r11f0867b39150ae5fac83dc178a89fee46d27611 -r5e70f173b3839314912e086b6c1c784b975ee646
--- Ringtoets/Piping/src/Ringtoets.Piping.Data/StochasticSoilProfile.cs	(.../StochasticSoilProfile.cs)	(revision 11f0867b39150ae5fac83dc178a89fee46d27611)
+++ Ringtoets/Piping/src/Ringtoets.Piping.Data/StochasticSoilProfile.cs	(.../StochasticSoilProfile.cs)	(revision 5e70f173b3839314912e086b6c1c784b975ee646)
@@ -19,6 +19,7 @@
 // Stichting Deltares and remain full property of Stichting Deltares at all times.
 // All rights reserved.
 
+using System;
 using Ringtoets.Piping.Primitives;
 
 namespace Ringtoets.Piping.Data
@@ -61,6 +62,24 @@
         /// </summary>
         public PipingSoilProfile SoilProfile { get; set; }
 
+        /// <summary>
+        /// Updates the <see cref="StochasticSoilProfile"/> with the properties
+        /// from <paramref name="fromProfile"/>.
+        /// </summary>
+        /// <param name="fromProfile">The <see cref="StochasticSoilProfile"/> to
+        /// obtain the property values from.</param>
+        /// <exception cref="ArgumentNullException">Thrown when <paramref name="fromProfile"/>
+        /// is <c>null</c>.</exception>
+        public void Update(StochasticSoilProfile fromProfile)
+        {
+            if (fromProfile == null)
+            {
+                throw new ArgumentNullException(nameof(fromProfile));
+            }
+            SoilProfile = fromProfile.SoilProfile;
+            Probability = fromProfile.Probability;
+        }
+
         public override string ToString()
         {
             return SoilProfile == null ? string.Empty : SoilProfile.ToString();
Index: Ringtoets/Piping/src/Ringtoets.Piping.Plugin/FileImporter/IStochasticSoilModelUpdateStrategy.cs
===================================================================
diff -u -rbbca25e660e1ebf3d4dce4e9ce6bbd07bf7a12e1 -r5e70f173b3839314912e086b6c1c784b975ee646
--- Ringtoets/Piping/src/Ringtoets.Piping.Plugin/FileImporter/IStochasticSoilModelUpdateStrategy.cs	(.../IStochasticSoilModelUpdateStrategy.cs)	(revision bbca25e660e1ebf3d4dce4e9ce6bbd07bf7a12e1)
+++ Ringtoets/Piping/src/Ringtoets.Piping.Plugin/FileImporter/IStochasticSoilModelUpdateStrategy.cs	(.../IStochasticSoilModelUpdateStrategy.cs)	(revision 5e70f173b3839314912e086b6c1c784b975ee646)
@@ -40,7 +40,7 @@
         /// is added.</param>
         /// <param name="notifyProgress">An action to be used to notify progress changes.</param>
         void UpdateModelWithImportedData(
-            ICollection<StochasticSoilModel> readStochasticSoilModels,
+            IEnumerable<StochasticSoilModel> readStochasticSoilModels,
             string sourceFilePath,
             StochasticSoilModelCollection targetCollection,
             Action<string, int, int> notifyProgress);
Index: Ringtoets/Piping/src/Ringtoets.Piping.Plugin/FileImporter/StochasticSoilModelImporter.cs
===================================================================
diff -u -rbbca25e660e1ebf3d4dce4e9ce6bbd07bf7a12e1 -r5e70f173b3839314912e086b6c1c784b975ee646
--- Ringtoets/Piping/src/Ringtoets.Piping.Plugin/FileImporter/StochasticSoilModelImporter.cs	(.../StochasticSoilModelImporter.cs)	(revision bbca25e660e1ebf3d4dce4e9ce6bbd07bf7a12e1)
+++ Ringtoets/Piping/src/Ringtoets.Piping.Plugin/FileImporter/StochasticSoilModelImporter.cs	(.../StochasticSoilModelImporter.cs)	(revision 5e70f173b3839314912e086b6c1c784b975ee646)
@@ -32,6 +32,7 @@
 using Ringtoets.Piping.IO.SoilProfile;
 using Ringtoets.Piping.Plugin.Properties;
 using Ringtoets.Piping.Primitives;
+using RingtoestCommonIOResources = Ringtoets.Common.IO.Properties.Resources;
 
 namespace Ringtoets.Piping.Plugin.FileImporter
 {
@@ -83,10 +84,67 @@
                 return false;
             }
 
-            modelUpdateStrategy.UpdateModelWithImportedData(importStochasticSoilModelResult.ImportedItems, FilePath, ImportTarget, NotifyProgress);
+            modelUpdateStrategy.UpdateModelWithImportedData(
+                GetValidStochasticSoilModels(importStochasticSoilModelResult),
+                FilePath, 
+                ImportTarget, 
+                NotifyProgress);
+
             return true;
         }
 
+        private IEnumerable<StochasticSoilModel> GetValidStochasticSoilModels(ReadResult<StochasticSoilModel> importStochasticSoilModelResult)
+        {
+            var currentStep = 1;
+            var importedModels = importStochasticSoilModelResult.ImportedItems.ToArray();
+            foreach (var importedModel in importedModels)
+            {
+                NotifyProgress(RingtoestCommonIOResources.Importer_ProgressText_Adding_imported_data_to_DataModel, currentStep, importedModels.Length);
+                if (ValidateStochasticSoilModel(importedModel))
+                {
+                    yield return importedModel;
+                }
+                currentStep++;
+            }
+        }
+
+        /// <summary>
+        /// Validate the definition of a <see cref="StochasticSoilModel"/>.
+        /// </summary>
+        /// <param name="stochasticSoilModel">The <see cref="StochasticSoilModel"/> to validate.</param>
+        /// <returns><c>false</c> when the stochastic soil model does not contain any stochastic soil profiles
+        /// or when a stochastic soil profile does not have a definition for a soil profile; <c>true</c>
+        /// otherwise.</returns>
+        protected bool ValidateStochasticSoilModel(StochasticSoilModel stochasticSoilModel)
+        {
+            if (!stochasticSoilModel.StochasticSoilProfiles.Any())
+            {
+                log.WarnFormat(Resources.PipingSoilProfilesImporter_ValidateStochasticSoilModel_No_profiles_found_in_stochastic_soil_model_0,
+                               stochasticSoilModel.Name);
+                return false;
+            }
+            if (stochasticSoilModel.StochasticSoilProfiles.Any(ssp => ssp.SoilProfile == null))
+            {
+                log.WarnFormat(Resources.PipingSoilProfilesImporter_ValidateStochasticSoilModel_SoilModel_0_with_stochastic_soil_profile_without_profile,
+                               stochasticSoilModel.Name);
+                return false;
+            }
+            if (!IsSumOfAllProbabilitiesEqualToOne(stochasticSoilModel))
+            {
+                log.WarnFormat(Resources.PipingSoilProfilesImporter_ValidateStochasticSoilModel_Sum_of_probabilities_of_stochastic_soil_model_0_is_not_correct,
+                               stochasticSoilModel.Name);
+            }
+            return true;
+        }
+
+        private static bool IsSumOfAllProbabilitiesEqualToOne(StochasticSoilModel stochasticSoilModel)
+        {
+            double sumOfAllScenarioProbabilities = stochasticSoilModel.StochasticSoilProfiles
+                                                                      .Where(s => s.SoilProfile != null)
+                                                                      .Sum(s => s.Probability);
+            return Math.Abs(sumOfAllScenarioProbabilities - 1.0) < 1e-6;
+        }
+
         protected override void LogImportCanceledMessage()
         {
             log.Info(Resources.PipingSoilProfilesImporter_Import_Import_canceled);
@@ -123,7 +181,7 @@
 
         private void HandleException(Exception e)
         {
-            var message = string.Format(Resources.PipingSoilProfilesImporter_CriticalErrorMessage_0_File_Skipped,
+            var message = String.Format(Resources.PipingSoilProfilesImporter_CriticalErrorMessage_0_File_Skipped,
                                         e.Message);
             log.Error(message);
         }
@@ -166,7 +224,7 @@
                 }
                 catch (StochasticSoilProfileReadException e)
                 {
-                    var message = string.Format(Resources.PipingSoilProfilesImporter_GetStochasticSoilModelReadResult_Error_0_stochastic_soil_model_skipped, e.Message);
+                    var message = String.Format(Resources.PipingSoilProfilesImporter_GetStochasticSoilModelReadResult_Error_0_stochastic_soil_model_skipped, e.Message);
                     log.Error(message);
                 }
             }
Index: Ringtoets/Piping/src/Ringtoets.Piping.Plugin/FileImporter/StochasticSoilModelReplaceData.cs
===================================================================
diff -u -rbbca25e660e1ebf3d4dce4e9ce6bbd07bf7a12e1 -r5e70f173b3839314912e086b6c1c784b975ee646
--- Ringtoets/Piping/src/Ringtoets.Piping.Plugin/FileImporter/StochasticSoilModelReplaceData.cs	(.../StochasticSoilModelReplaceData.cs)	(revision bbca25e660e1ebf3d4dce4e9ce6bbd07bf7a12e1)
+++ Ringtoets/Piping/src/Ringtoets.Piping.Plugin/FileImporter/StochasticSoilModelReplaceData.cs	(.../StochasticSoilModelReplaceData.cs)	(revision 5e70f173b3839314912e086b6c1c784b975ee646)
@@ -23,16 +23,17 @@
 using System.Collections.Generic;
 using System.Linq;
 using log4net;
-using Ringtoets.Common.IO.Properties;
 using Ringtoets.Piping.Data;
 
 namespace Ringtoets.Piping.Plugin.FileImporter
 {
     /// <summary>
     /// Strategy for replacing the stochastic soil models with the imported stochastic soil models. 
     /// </summary>
-    public class StochasticSoilModelReplaceData : StochasticSoilModelUpdateStrategyBase
+    public class StochasticSoilModelReplaceData : IStochasticSoilModelUpdateStrategy
     {
+        private readonly ILog log = LogManager.GetLogger(typeof(StochasticSoilModelReplaceData));
+
         /// <summary>
         /// Adds the <paramref name="readStochasticSoilModels"/> to the <paramref name="targetCollection"/>.
         /// </summary>
@@ -41,24 +42,15 @@
         /// were imported.</param>
         /// <param name="targetCollection">The current collection of <see cref="StochasticSoilModel"/>.</param>
         /// <param name="notifyProgress">An action to be used to notify progress changes.</param>
-        public override void UpdateModelWithImportedData(
-            ICollection<StochasticSoilModel> readStochasticSoilModels,
+        public void UpdateModelWithImportedData(
+            IEnumerable<StochasticSoilModel> readStochasticSoilModels,
             string sourceFilePath,
             StochasticSoilModelCollection targetCollection,
             Action<string, int, int> notifyProgress)
         {
-            var log = LogManager.GetLogger(typeof(StochasticSoilModelImporter));
-
-            var stochasticSoilModelCount = readStochasticSoilModels.Count;
-            var currentIndex = 1;
-            var modelsToAdd = new List<StochasticSoilModel>(readStochasticSoilModels.Count);
+            var modelsToAdd = new List<StochasticSoilModel>();
             foreach (StochasticSoilModel readStochasticSoilModel in readStochasticSoilModels)
             {
-                notifyProgress(Resources.Importer_ProgressText_Adding_imported_data_to_DataModel, currentIndex++, stochasticSoilModelCount);
-                if (!ValidateStochasticSoilModel(readStochasticSoilModel))
-                {
-                    continue;
-                }
                 var stochasticSoilModel = targetCollection.FirstOrDefault(ssm => ssm.Id == readStochasticSoilModel.Id);
                 if (stochasticSoilModel != null)
                 {
Index: Ringtoets/Piping/src/Ringtoets.Piping.Plugin/FileImporter/StochasticSoilModelUpdateData.cs
===================================================================
diff -u -rbbca25e660e1ebf3d4dce4e9ce6bbd07bf7a12e1 -r5e70f173b3839314912e086b6c1c784b975ee646
--- Ringtoets/Piping/src/Ringtoets.Piping.Plugin/FileImporter/StochasticSoilModelUpdateData.cs	(.../StochasticSoilModelUpdateData.cs)	(revision bbca25e660e1ebf3d4dce4e9ce6bbd07bf7a12e1)
+++ Ringtoets/Piping/src/Ringtoets.Piping.Plugin/FileImporter/StochasticSoilModelUpdateData.cs	(.../StochasticSoilModelUpdateData.cs)	(revision 5e70f173b3839314912e086b6c1c784b975ee646)
@@ -31,8 +31,10 @@
     /// <summary>
     /// Strategy for updating the current stochastic soil models with the imported stochastic soil models.
     /// </summary>
-    public class StochasticSoilModelUpdateData : StochasticSoilModelUpdateStrategyBase
+    public class StochasticSoilModelUpdateData : IStochasticSoilModelUpdateStrategy
     {
+        private readonly ILog log = LogManager.GetLogger(typeof(StochasticSoilModelUpdateData));
+
         /// <summary>
         /// Updates the <paramref name="targetCollection"/>. 
         /// Updates stochastic soil models in <paramref name="targetCollection"/> that are part of
@@ -47,32 +49,34 @@
         /// were imported.</param>
         /// <param name="targetCollection">The current collection of <see cref="StochasticSoilModel"/>.</param>
         /// <param name="notifyProgress">An action to be used to notify progress changes.</param>
-        public override void UpdateModelWithImportedData(
-            ICollection<StochasticSoilModel> readStochasticSoilModels,
+        /// <exception cref="InvalidOperationException">Thrown when <paramref name="targetCollection"/>
+        /// contains multiple <see cref="StochasticSoilModel"/> with the same <see cref="StochasticSoilModel.Name"/>,
+        /// and <paramref name="readStochasticSoilModels"/> also contains a <see cref="StochasticSoilModel"/> with
+        /// the same name.
+        /// </exception>
+        public void UpdateModelWithImportedData(
+            IEnumerable<StochasticSoilModel> readStochasticSoilModels,
             string sourceFilePath,
             StochasticSoilModelCollection targetCollection,
             Action<string, int, int> notifyProgress)
         {
-            var log = LogManager.GetLogger(typeof(StochasticSoilModelImporter));
+            var updatedModels = new List<StochasticSoilModel>();
 
-            var stochasticSoilModelCount = readStochasticSoilModels.Count;
-            var currentIndex = 1;
-            var modelsToAdd = new List<StochasticSoilModel>(readStochasticSoilModels.Count);
-            foreach (StochasticSoilModel readStochasticSoilModel in readStochasticSoilModels)
+            foreach (var readModel in readStochasticSoilModels)
             {
-                notifyProgress(Resources.Importer_ProgressText_Adding_imported_data_to_DataModel, currentIndex++, stochasticSoilModelCount);
-                if (!ValidateStochasticSoilModel(readStochasticSoilModel))
+                var existingModel = targetCollection.SingleOrDefault(existing => existing.Name.Equals(readModel.Name));
+                if (existingModel != null)
                 {
-                    continue;
+                    existingModel.Update(readModel);
+                    updatedModels.Add(existingModel);
                 }
-                var stochasticSoilModel = targetCollection.FirstOrDefault(ssm => ssm.Id == readStochasticSoilModel.Id);
-                if (stochasticSoilModel != null)
+                else
                 {
-                    log.WarnFormat(Properties.Resources.PipingSoilProfilesImporter_AddImportedDataToModel_Stochastisch_soil_model_0_already_exists, stochasticSoilModel.Name);
+                    updatedModels.Add(readModel);
                 }
-                modelsToAdd.Add(readStochasticSoilModel);
             }
-            targetCollection.AddRange(modelsToAdd, sourceFilePath);
+            targetCollection.Clear();
+            targetCollection.AddRange(updatedModels, sourceFilePath);
         }
     }
 }
\ No newline at end of file
Fisheye: Tag 5e70f173b3839314912e086b6c1c784b975ee646 refers to a dead (removed) revision in file `Ringtoets/Piping/src/Ringtoets.Piping.Plugin/FileImporter/StochasticSoilModelUpdateStrategyBase.cs'.
Fisheye: No comparison available.  Pass `N' to diff?
Index: Ringtoets/Piping/src/Ringtoets.Piping.Plugin/Ringtoets.Piping.Plugin.csproj
===================================================================
diff -u -rbbca25e660e1ebf3d4dce4e9ce6bbd07bf7a12e1 -r5e70f173b3839314912e086b6c1c784b975ee646
--- Ringtoets/Piping/src/Ringtoets.Piping.Plugin/Ringtoets.Piping.Plugin.csproj	(.../Ringtoets.Piping.Plugin.csproj)	(revision bbca25e660e1ebf3d4dce4e9ce6bbd07bf7a12e1)
+++ Ringtoets/Piping/src/Ringtoets.Piping.Plugin/Ringtoets.Piping.Plugin.csproj	(.../Ringtoets.Piping.Plugin.csproj)	(revision 5e70f173b3839314912e086b6c1c784b975ee646)
@@ -65,7 +65,6 @@
     <Compile Include="FileImporter\StochasticSoilModelImporter.cs" />
     <Compile Include="FileImporter\PipingSurfaceLinesCsvImporter.cs" />
     <Compile Include="FileImporter\RingtoetsPipingSurfaceLineExtensions.cs" />
-    <Compile Include="FileImporter\StochasticSoilModelUpdateStrategyBase.cs" />
     <Compile Include="Properties\AssemblyInfo.cs" />
     <Compile Include="Properties\Resources.Designer.cs">
       <AutoGen>True</AutoGen>
Index: Ringtoets/Piping/test/Ringtoets.Piping.Data.Test/StochasticSoilModelTest.cs
===================================================================
diff -u -rcda9bb0707f49cfb8e685d3ec04da01240c73f26 -r5e70f173b3839314912e086b6c1c784b975ee646
--- Ringtoets/Piping/test/Ringtoets.Piping.Data.Test/StochasticSoilModelTest.cs	(.../StochasticSoilModelTest.cs)	(revision cda9bb0707f49cfb8e685d3ec04da01240c73f26)
+++ Ringtoets/Piping/test/Ringtoets.Piping.Data.Test/StochasticSoilModelTest.cs	(.../StochasticSoilModelTest.cs)	(revision 5e70f173b3839314912e086b6c1c784b975ee646)
@@ -19,9 +19,12 @@
 // Stichting Deltares and remain full property of Stichting Deltares at all times.
 // All rights reserved.
 
+using System;
 using Core.Common.Base.Geometry;
 using NUnit.Framework;
 using Rhino.Mocks;
+using Ringtoets.Piping.KernelWrapper.TestUtil;
+using Ringtoets.Piping.Primitives;
 
 namespace Ringtoets.Piping.Data.Test
 {
@@ -92,6 +95,75 @@
         }
 
         [Test]
+        public void Update_WithNullModel_ThrowsArgumentNullException()
+        {
+            // Setup
+            var model = new StochasticSoilModel(1234, "name", "segment");
+
+            // Call
+            TestDelegate test = () => model.Update(null);
+
+            // Assert
+            string paramName = Assert.Throws<ArgumentNullException>(test).ParamName;
+            Assert.AreEqual("fromModel", paramName);
+        }
+
+        [Test]
+        public void Update_WithOtherModel_PropertiesUpdated()
+        {
+            // Setup
+            var equalProfileName = "nameA";
+            var model = new StochasticSoilModel(1234, "name", "segment");
+            model.Geometry.Add(new Point2D(6, 2));
+            model.Geometry.Add(new Point2D(4, 3));
+
+            var stochasticProfileA = new StochasticSoilProfile(0.5, SoilProfileType.SoilProfile1D, -11)
+            {
+                SoilProfile = new TestPipingSoilProfile(equalProfileName)
+            };
+            var stochasticProfileB = new StochasticSoilProfile(0.5, SoilProfileType.SoilProfile1D, -52)
+            {
+                SoilProfile = new TestPipingSoilProfile("nameB")
+            };
+            model.StochasticSoilProfiles.Add(stochasticProfileA);
+            model.StochasticSoilProfiles.Add(stochasticProfileB);
+
+            var otherName = "other name";
+            var otherSegmentName = "other segment";
+            var otherModel = new StochasticSoilModel(41, otherName, otherSegmentName);
+
+            var otherPointA = new Point2D(2,0);
+            var otherPointB = new Point2D(3,0);
+            otherModel.Geometry.Add(otherPointA);
+            otherModel.Geometry.Add(otherPointB);
+
+            var otherStochasticProfileA = new StochasticSoilProfile(0.7, SoilProfileType.SoilProfile1D, -1)
+            {
+                SoilProfile = new TestPipingSoilProfile(equalProfileName)
+            };
+            var otherStochasticProfileB = new StochasticSoilProfile(0.3, SoilProfileType.SoilProfile1D, -2)
+            {
+                SoilProfile = new TestPipingSoilProfile("other profile name")
+            };
+            otherModel.StochasticSoilProfiles.Add(otherStochasticProfileA);
+            otherModel.StochasticSoilProfiles.Add(otherStochasticProfileB);
+
+            // Call
+            model.Update(otherModel);
+
+            // Assert
+            Assert.AreEqual(otherName, model.Name);
+            Assert.AreEqual(otherSegmentName, model.SegmentName);
+            Assert.AreSame(otherPointA, model.Geometry[0]);
+            Assert.AreSame(otherPointB, model.Geometry[1]);
+            Assert.AreEqual(2, model.StochasticSoilProfiles.Count);
+            Assert.AreSame(stochasticProfileA, model.StochasticSoilProfiles[0]);
+            Assert.AreSame(otherStochasticProfileA.SoilProfile, model.StochasticSoilProfiles[0].SoilProfile);
+            Assert.AreNotSame(stochasticProfileB, model.StochasticSoilProfiles[1]);
+            Assert.AreSame(otherStochasticProfileB.SoilProfile, model.StochasticSoilProfiles[1].SoilProfile);
+        }
+
+        [Test]
         [TestCase(null)]
         [TestCase("")]
         [TestCase("some name")]
Index: Ringtoets/Piping/test/Ringtoets.Piping.Data.Test/StochasticSoilProfileTest.cs
===================================================================
diff -u -r8832cfacbfb0a999d9dd5ddcb93fd81bdb2fb09f -r5e70f173b3839314912e086b6c1c784b975ee646
--- Ringtoets/Piping/test/Ringtoets.Piping.Data.Test/StochasticSoilProfileTest.cs	(.../StochasticSoilProfileTest.cs)	(revision 8832cfacbfb0a999d9dd5ddcb93fd81bdb2fb09f)
+++ Ringtoets/Piping/test/Ringtoets.Piping.Data.Test/StochasticSoilProfileTest.cs	(.../StochasticSoilProfileTest.cs)	(revision 5e70f173b3839314912e086b6c1c784b975ee646)
@@ -19,7 +19,9 @@
 // Stichting Deltares and remain full property of Stichting Deltares at all times.
 // All rights reserved.
 
+using System;
 using NUnit.Framework;
+using Ringtoets.Piping.KernelWrapper.TestUtil;
 using Ringtoets.Piping.Primitives;
 
 namespace Ringtoets.Piping.Data.Test
@@ -43,6 +45,41 @@
         }
 
         [Test]
+        public void Update_WithNullProfile_ThrowsArgumentNullException()
+        {
+            // Setup
+            var stochasticProfile = new StochasticSoilProfile(0.0, SoilProfileType.SoilProfile1D, 0);
+
+            // Call
+            TestDelegate test = () => stochasticProfile.Update(null);
+
+            // Assert
+            string paramName = Assert.Throws<ArgumentNullException>(test).ParamName;
+            Assert.AreEqual("fromProfile", paramName);
+        }
+
+        [Test]
+        public void Update_WithValidProfile_UpdatesProperties()
+        {
+            // Setup
+            var newProbability = 1.0;
+            var newProfile = new TestPipingSoilProfile();
+            var otherStochasticProfile = new StochasticSoilProfile(newProbability, SoilProfileType.SoilProfile1D, 0)
+            {
+                SoilProfile = newProfile
+            };
+
+            var stochasticProfile = new StochasticSoilProfile(0.0, SoilProfileType.SoilProfile1D, 0);
+
+            // Call
+            stochasticProfile.Update(otherStochasticProfile);
+
+            // Assert
+            Assert.AreEqual(newProbability, stochasticProfile.Probability);
+            Assert.AreSame(newProfile, stochasticProfile.SoilProfile);
+        }
+
+        [Test]
         [TestCase(null)]
         [TestCase("")]
         [TestCase("some name")]
Index: Ringtoets/Piping/test/Ringtoets.Piping.Data.TestUtil.Test/Ringtoets.Piping.Data.TestUtil.Test.csproj
===================================================================
diff -u -r026cc14e6eb321e7e3e1c16d2e278cab74602339 -r5e70f173b3839314912e086b6c1c784b975ee646
--- Ringtoets/Piping/test/Ringtoets.Piping.Data.TestUtil.Test/Ringtoets.Piping.Data.TestUtil.Test.csproj	(.../Ringtoets.Piping.Data.TestUtil.Test.csproj)	(revision 026cc14e6eb321e7e3e1c16d2e278cab74602339)
+++ Ringtoets/Piping/test/Ringtoets.Piping.Data.TestUtil.Test/Ringtoets.Piping.Data.TestUtil.Test.csproj	(.../Ringtoets.Piping.Data.TestUtil.Test.csproj)	(revision 5e70f173b3839314912e086b6c1c784b975ee646)
@@ -53,6 +53,7 @@
     <Compile Include="Properties\AssemblyInfo.cs" />
     <Compile Include="Segment2DLoopCollectionHelperTest.cs" />
     <Compile Include="TestPipingFailureMechanismTest.cs" />
+    <Compile Include="TestStochasticSoilModelTest.cs" />
   </ItemGroup>
   <ItemGroup>
     <None Include="..\..\..\..\build\Copying.licenseheader">
@@ -74,6 +75,10 @@
       <Project>{ce994cc9-6f6a-48ac-b4be-02c30a21f4db}</Project>
       <Name>Ringtoets.Piping.Data</Name>
     </ProjectReference>
+    <ProjectReference Include="..\..\src\Ringtoets.Piping.Primitives\Ringtoets.Piping.Primitives.csproj">
+      <Project>{14c6f716-64e2-4bc4-a1ef-05865fcefa4c}</Project>
+      <Name>Ringtoets.Piping.Primitives</Name>
+    </ProjectReference>
     <ProjectReference Include="..\..\src\Ringtoets.Piping.Service\Ringtoets.Piping.Service.csproj">
       <Project>{10B8D63D-87E8-46DF-ACA9-A8CF22EE8FB5}</Project>
       <Name>Ringtoets.Piping.Service</Name>
@@ -82,6 +87,10 @@
       <Project>{955E574D-67CE-4347-AA6B-7DF8A04ED754}</Project>
       <Name>Ringtoets.Piping.Data.TestUtil</Name>
     </ProjectReference>
+    <ProjectReference Include="..\Ringtoets.Piping.KernelWrapper.TestUtil\Ringtoets.Piping.KernelWrapper.TestUtil.csproj">
+      <Project>{27E0A5C9-3ABF-426A-A3DA-7D0B83A218C8}</Project>
+      <Name>Ringtoets.Piping.KernelWrapper.TestUtil</Name>
+    </ProjectReference>
   </ItemGroup>
   <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
   <!-- To modify your build process, add your task inside one of the targets below and uncomment it. 
Index: Ringtoets/Piping/test/Ringtoets.Piping.Data.TestUtil.Test/TestStochasticSoilModelTest.cs
===================================================================
diff -u
--- Ringtoets/Piping/test/Ringtoets.Piping.Data.TestUtil.Test/TestStochasticSoilModelTest.cs	(revision 0)
+++ Ringtoets/Piping/test/Ringtoets.Piping.Data.TestUtil.Test/TestStochasticSoilModelTest.cs	(revision 5e70f173b3839314912e086b6c1c784b975ee646)
@@ -0,0 +1,61 @@
+// Copyright (C) Stichting Deltares 2016. All rights reserved.
+//
+// This file is part of Ringtoets.
+//
+// Ringtoets is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+// 
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program. If not, see <http://www.gnu.org/licenses/>.
+//
+// All names, logos, and references to "Deltares" are registered trademarks of
+// Stichting Deltares and remain full property of Stichting Deltares at all times.
+// All rights reserved.
+
+using System.Linq;
+using NUnit.Framework;
+
+namespace Ringtoets.Piping.Data.TestUtil.Test
+{
+    [TestFixture]
+    public class TestStochasticSoilModelTest
+    {
+        [Test]
+        public void DefaultConstructor_ExpectedPropertiesSet()
+        {
+            // Call
+            var model = new TestStochasticSoilModel();
+
+            // Assert
+            Assert.IsEmpty(model.Name);
+            Assert.IsEmpty(model.SegmentName);
+            Assert.AreEqual(2, model.StochasticSoilProfiles.Count);
+            CollectionAssert.AreEquivalent(new [] { 0.5, 0.5 }, model.StochasticSoilProfiles.Select(p => p.Probability));
+            CollectionAssert.AllItemsAreNotNull(model.StochasticSoilProfiles.Select(p => p.SoilProfile));
+        }
+
+        [Test]
+        public void Constructor_WitValidName_ExpectedPropertiesSet()
+        {
+            // Setup
+            var name = "some name";
+
+            // Call
+            var model = new TestStochasticSoilModel(name);
+
+            // Assert
+            Assert.AreEqual(name, model.Name);
+            Assert.IsEmpty(model.SegmentName);
+            Assert.AreEqual(2, model.StochasticSoilProfiles.Count);
+            CollectionAssert.AreEquivalent(new[] { 0.5, 0.5 }, model.StochasticSoilProfiles.Select(p => p.Probability));
+            CollectionAssert.AllItemsAreNotNull(model.StochasticSoilProfiles.Select(p => p.SoilProfile));
+        }
+    }
+}
\ No newline at end of file
Index: Ringtoets/Piping/test/Ringtoets.Piping.Data.TestUtil/TestStochasticSoilModel.cs
===================================================================
diff -u -rae09732abad92d670274d8661856965b59021cd5 -r5e70f173b3839314912e086b6c1c784b975ee646
--- Ringtoets/Piping/test/Ringtoets.Piping.Data.TestUtil/TestStochasticSoilModel.cs	(.../TestStochasticSoilModel.cs)	(revision ae09732abad92d670274d8661856965b59021cd5)
+++ Ringtoets/Piping/test/Ringtoets.Piping.Data.TestUtil/TestStochasticSoilModel.cs	(.../TestStochasticSoilModel.cs)	(revision 5e70f173b3839314912e086b6c1c784b975ee646)
@@ -26,19 +26,21 @@
 {
     public class TestStochasticSoilModel : StochasticSoilModel
     {
-        public TestStochasticSoilModel() : base(0, string.Empty, string.Empty)
+        public TestStochasticSoilModel(string name) : base(0, name, string.Empty)
         {
             StochasticSoilProfiles.AddRange(new[]
             {
                 new StochasticSoilProfile(0.5, SoilProfileType.SoilProfile1D, 0)
                 {
-                    SoilProfile = new TestPipingSoilProfile()
+                    SoilProfile = new TestPipingSoilProfile("A")
                 },
                 new StochasticSoilProfile(0.5, SoilProfileType.SoilProfile1D, 0)
                 {
-                    SoilProfile = new TestPipingSoilProfile()
+                    SoilProfile = new TestPipingSoilProfile("B")
                 }
             });
         }
+        public TestStochasticSoilModel() : this(string.Empty)
+        { }
     }
 }
\ No newline at end of file
Index: Ringtoets/Piping/test/Ringtoets.Piping.IO.Test/Ringtoets.Piping.IO.Test.csproj
===================================================================
diff -u -r6a5d7b40b7ba4dcb73e393075338352d194e97c2 -r5e70f173b3839314912e086b6c1c784b975ee646
--- Ringtoets/Piping/test/Ringtoets.Piping.IO.Test/Ringtoets.Piping.IO.Test.csproj	(.../Ringtoets.Piping.IO.Test.csproj)	(revision 6a5d7b40b7ba4dcb73e393075338352d194e97c2)
+++ Ringtoets/Piping/test/Ringtoets.Piping.IO.Test/Ringtoets.Piping.IO.Test.csproj	(.../Ringtoets.Piping.IO.Test.csproj)	(revision 5e70f173b3839314912e086b6c1c784b975ee646)
@@ -74,10 +74,8 @@
     <Compile Include="Exceptions\StochasticSoilProfileReadExceptionTest.cs" />
     <Compile Include="SoilProfile\LayerPropertiesTest.cs" />
     <Compile Include="SoilProfile\SoilLayerColorConversionHelperTest.cs" />
-    <Compile Include="SoilProfile\StochasticSoilModelTest.cs" />
     <Compile Include="SoilProfile\StochasticSoilModelReaderTest.cs" />
     <Compile Include="SoilProfile\StochasticSoilProfileReaderTest.cs" />
-    <Compile Include="SoilProfile\StochasticSoilProfileProbabilityTest.cs" />
     <Compile Include="SoilProfile\SoilDatabaseVersionReaderTest.cs" />
     <Compile Include="SurfaceLines\CharacteristicPointsCsvReaderTest.cs" />
     <Compile Include="SurfaceLines\CharacteristicPointsTest.cs" />
Fisheye: Tag 5e70f173b3839314912e086b6c1c784b975ee646 refers to a dead (removed) revision in file `Ringtoets/Piping/test/Ringtoets.Piping.IO.Test/SoilProfile/StochasticSoilModelTest.cs'.
Fisheye: No comparison available.  Pass `N' to diff?
Fisheye: Tag 5e70f173b3839314912e086b6c1c784b975ee646 refers to a dead (removed) revision in file `Ringtoets/Piping/test/Ringtoets.Piping.IO.Test/SoilProfile/StochasticSoilProfileProbabilityTest.cs'.
Fisheye: No comparison available.  Pass `N' to diff?
Index: Ringtoets/Piping/test/Ringtoets.Piping.KernelWrapper.TestUtil.Test/Ringtoets.Piping.KernelWrapper.TestUtil.Test.csproj
===================================================================
diff -u -r6a5d7b40b7ba4dcb73e393075338352d194e97c2 -r5e70f173b3839314912e086b6c1c784b975ee646
--- Ringtoets/Piping/test/Ringtoets.Piping.KernelWrapper.TestUtil.Test/Ringtoets.Piping.KernelWrapper.TestUtil.Test.csproj	(.../Ringtoets.Piping.KernelWrapper.TestUtil.Test.csproj)	(revision 6a5d7b40b7ba4dcb73e393075338352d194e97c2)
+++ Ringtoets/Piping/test/Ringtoets.Piping.KernelWrapper.TestUtil.Test/Ringtoets.Piping.KernelWrapper.TestUtil.Test.csproj	(.../Ringtoets.Piping.KernelWrapper.TestUtil.Test.csproj)	(revision 5e70f173b3839314912e086b6c1c784b975ee646)
@@ -60,6 +60,7 @@
     <Compile Include="SubCalculator\SellmeijerCalculatorStubTest.cs" />
     <Compile Include="SubCalculator\TestPipingSubCalculatorFactoryTest.cs" />
     <Compile Include="SubCalculator\UpliftCalculatorStubTest.cs" />
+    <Compile Include="TestPipingSoilProfileTest.cs" />
   </ItemGroup>
   <ItemGroup>
     <None Include="..\..\..\..\build\Copying.licenseheader">
@@ -72,6 +73,10 @@
       <Project>{D64E4F0E-E341-496F-82B2-941AD202B4E3}</Project>
       <Name>Ringtoets.Piping.KernelWrapper</Name>
     </ProjectReference>
+    <ProjectReference Include="..\..\src\Ringtoets.Piping.Primitives\Ringtoets.Piping.Primitives.csproj">
+      <Project>{14c6f716-64e2-4bc4-a1ef-05865fcefa4c}</Project>
+      <Name>Ringtoets.Piping.Primitives</Name>
+    </ProjectReference>
     <ProjectReference Include="..\Ringtoets.Piping.KernelWrapper.TestUtil\Ringtoets.Piping.KernelWrapper.TestUtil.csproj">
       <Project>{27E0A5C9-3ABF-426A-A3DA-7D0B83A218C8}</Project>
       <Name>Ringtoets.Piping.KernelWrapper.TestUtil</Name>
Index: Ringtoets/Piping/test/Ringtoets.Piping.KernelWrapper.TestUtil.Test/TestPipingSoilProfileTest.cs
===================================================================
diff -u
--- Ringtoets/Piping/test/Ringtoets.Piping.KernelWrapper.TestUtil.Test/TestPipingSoilProfileTest.cs	(revision 0)
+++ Ringtoets/Piping/test/Ringtoets.Piping.KernelWrapper.TestUtil.Test/TestPipingSoilProfileTest.cs	(revision 5e70f173b3839314912e086b6c1c784b975ee646)
@@ -0,0 +1,59 @@
+// Copyright (C) Stichting Deltares 2016. All rights reserved.
+//
+// This file is part of Ringtoets.
+//
+// Ringtoets is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+// 
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program. If not, see <http://www.gnu.org/licenses/>.
+//
+// All names, logos, and references to "Deltares" are registered trademarks of
+// Stichting Deltares and remain full property of Stichting Deltares at all times.
+// All rights reserved.
+
+using System.Linq;
+using NUnit.Framework;
+
+namespace Ringtoets.Piping.KernelWrapper.TestUtil.Test
+{
+    [TestFixture]
+    public class TestPipingSoilProfileTest
+    {
+        [Test]
+        public void DefaultConstructor_ExpectedPropertiesSet()
+        {
+            // Call
+            var profile = new TestPipingSoilProfile();
+
+            // Assert
+            Assert.IsEmpty(profile.Name);
+            Assert.AreEqual(0.0, profile.Bottom);
+            CollectionAssert.AreEquivalent(new[] { true }, profile.Layers.Select(l => l.IsAquifer));
+            CollectionAssert.AreEquivalent(new[] { 0.0 }, profile.Layers.Select(l => l.Top));
+        }
+
+        [Test]
+        public void Constructor_WitValidName_ExpectedPropertiesSet()
+        {
+            // Setup
+            var name = "some name";
+
+            // Call
+            var profile = new TestPipingSoilProfile(name);
+
+            // Assert
+            Assert.AreEqual(name, profile.Name);
+            Assert.AreEqual(0.0, profile.Bottom);
+            CollectionAssert.AreEquivalent(new[] { true }, profile.Layers.Select(l => l.IsAquifer));
+            CollectionAssert.AreEquivalent(new[] { 0.0 }, profile.Layers.Select(l => l.Top));
+        }
+    }
+}
\ No newline at end of file
Index: Ringtoets/Piping/test/Ringtoets.Piping.KernelWrapper.TestUtil/TestPipingSoilProfile.cs
===================================================================
diff -u -r889b68c331c4545ddd9a6875d48cafd86f656494 -r5e70f173b3839314912e086b6c1c784b975ee646
--- Ringtoets/Piping/test/Ringtoets.Piping.KernelWrapper.TestUtil/TestPipingSoilProfile.cs	(.../TestPipingSoilProfile.cs)	(revision 889b68c331c4545ddd9a6875d48cafd86f656494)
+++ Ringtoets/Piping/test/Ringtoets.Piping.KernelWrapper.TestUtil/TestPipingSoilProfile.cs	(.../TestPipingSoilProfile.cs)	(revision 5e70f173b3839314912e086b6c1c784b975ee646)
@@ -28,7 +28,7 @@
     /// A <see cref="PipingSoilProfile"/> configured to be usable immediately for testing
     /// purposes.
     /// </summary>
-    /// <seealso cref="Ringtoets.Piping.Primitives.PipingSoilProfile" />
+    /// <seealso cref="PipingSoilProfile" />
     public class TestPipingSoilProfile : PipingSoilProfile
     {
         /// <summary>
@@ -41,7 +41,20 @@
         /// with <see cref="PipingSoilLayer.Top"/> set to <c>0.0</c>.</item>
         /// </list>
         /// </summary>
-        public TestPipingSoilProfile() : base("", 0.0, new Collection<PipingSoilLayer>
+        public TestPipingSoilProfile() : this("") {}
+
+        /// <summary>
+        /// Creates a new instance of <see cref="TestPipingSoilProfile"/>, which is a <see cref="PipingSoilProfile"/>
+        /// which has:
+        /// <list type="bullet">
+        /// <item><see cref="PipingSoilProfile.Name"/> set to <paramref name="name"/></item>
+        /// <item><see cref="PipingSoilProfile.Bottom"/> set to <c>0.0</c></item>
+        /// <item><see cref="PipingSoilProfile.Layers"/> set to a collection with a single <see cref="PipingSoilLayer"/>
+        /// with <see cref="PipingSoilLayer.Top"/> set to <c>0.0</c>.</item>
+        /// </list>
+        /// </summary>
+        /// <param name="name">The name for the profile.</param>
+        public TestPipingSoilProfile(string name) : base(name, 0.0, new Collection<PipingSoilLayer> 
         {
             new PipingSoilLayer(0.0)
             {
Index: Ringtoets/Piping/test/Ringtoets.Piping.Plugin.Test/FileImporter/StochasticSoilModelUpdateDataTest.cs
===================================================================
diff -u
--- Ringtoets/Piping/test/Ringtoets.Piping.Plugin.Test/FileImporter/StochasticSoilModelUpdateDataTest.cs	(revision 0)
+++ Ringtoets/Piping/test/Ringtoets.Piping.Plugin.Test/FileImporter/StochasticSoilModelUpdateDataTest.cs	(revision 5e70f173b3839314912e086b6c1c784b975ee646)
@@ -0,0 +1,161 @@
+// Copyright (C) Stichting Deltares 2016. All rights reserved.
+//
+// This file is part of Ringtoets.
+//
+// Ringtoets is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+// 
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program. If not, see <http://www.gnu.org/licenses/>.
+//
+// All names, logos, and references to "Deltares" are registered trademarks of
+// Stichting Deltares and remain full property of Stichting Deltares at all times.
+// All rights reserved.
+
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using NUnit.Framework;
+using Ringtoets.Piping.Data;
+using Ringtoets.Piping.Data.TestUtil;
+using Ringtoets.Piping.Plugin.FileImporter;
+
+namespace Ringtoets.Piping.Plugin.Test.FileImporter
+{
+    [TestFixture]
+    public class StochasticSoilModelUpdateDataTest
+    {
+        [Test]
+        public void DefaultConstructor_CreatesNewInstance()
+        {
+            // Call
+            var strategy = new StochasticSoilModelUpdateData();
+
+            // Assert
+            Assert.IsInstanceOf<IStochasticSoilModelUpdateStrategy>(strategy);
+        }
+
+        [Test]
+        public void UpdateModelWithImportedData_MultipleCurrentModelsWithSameNameAndImportedDataContainsModelWithSameName_ThrowsInvalidOperationException()
+        {
+            // Setup
+            var nonUniqueName = "non-unique name";
+            var sourceFilePath = "path";
+
+            var targetCollection = new StochasticSoilModelCollection();
+            targetCollection.AddRange(new[]
+                                      {
+                                          new TestStochasticSoilModel(nonUniqueName),
+                                          new TestStochasticSoilModel(nonUniqueName)
+                                      }, sourceFilePath);
+
+            var strategy = new StochasticSoilModelUpdateData();
+            var importedStochasticSoilModels = new[]
+            {
+                new TestStochasticSoilModel(nonUniqueName)
+            };
+
+            // Call
+            TestDelegate test = () => strategy.UpdateModelWithImportedData(importedStochasticSoilModels, sourceFilePath, targetCollection, NotifyProgress);
+
+            // Assert
+            Assert.Throws<InvalidOperationException>(test);
+        }
+
+        [Test]
+        public void UpdateModelWithImportedData_CurrentModelsEmptyModelsImported_NewModelsAdded()
+        {
+            // Setup
+            var importedStochasticSoilModels = new[]
+            {
+                new TestStochasticSoilModel(),
+                new TestStochasticSoilModel()
+            };
+            var strategy = new StochasticSoilModelUpdateData();
+            var targetCollection = new StochasticSoilModelCollection();
+
+            // Call
+            strategy.UpdateModelWithImportedData(importedStochasticSoilModels, "path", targetCollection, NotifyProgress);
+
+            // Assert
+            CollectionAssert.AreEquivalent(importedStochasticSoilModels, targetCollection);
+        }
+
+        [Test]
+        public void UpdateModelWithImportedData_CurrentModelsContainsModelsImportedDataEmpty_ModelsRemoved()
+        {
+            // Setup
+            var sourceFilePath = "path";
+            var targetCollection = new StochasticSoilModelCollection();
+            targetCollection.AddRange(new[]
+                                      {
+                                          new TestStochasticSoilModel(),
+                                          new TestStochasticSoilModel()
+                                      }, sourceFilePath);
+
+            var strategy = new StochasticSoilModelUpdateData();
+
+            // Call
+            strategy.UpdateModelWithImportedData(new List<StochasticSoilModel>(), sourceFilePath, targetCollection, NotifyProgress);
+
+            // Assert
+            CollectionAssert.IsEmpty(targetCollection);
+        }
+
+        [Test]
+        public void UpdateModelWithImportedData_CurrentModelsContainsModelsImportedDataContainsModelWithOtherName_ModelReplaced()
+        {
+            // Setup
+            var sourceFilePath = "path";
+            var readModel = new TestStochasticSoilModel("read");
+            var existingModel = new TestStochasticSoilModel("existing");
+
+            var targetCollection = new StochasticSoilModelCollection();
+            targetCollection.AddRange(new[]
+                                      {
+                                          existingModel,
+                                      }, sourceFilePath);
+
+            var strategy = new StochasticSoilModelUpdateData();
+
+            // Call
+            strategy.UpdateModelWithImportedData(new[] { readModel }, sourceFilePath, targetCollection, NotifyProgress);
+
+            // Assert
+            Assert.AreSame(readModel, targetCollection.First());
+        }
+
+        [Test]
+        public void UpdateModelWithImportedData_CurrentModelsContainsModelsImportedDataContainsModelWithSameName_ModelUpdated()
+        {
+            // Setup
+            var sourceFilePath = "path";
+            var modelsName = "same model";
+            var readModel = new TestStochasticSoilModel(modelsName);
+            var existingModel = new TestStochasticSoilModel(modelsName);
+
+            var targetCollection = new StochasticSoilModelCollection();
+            targetCollection.AddRange(new[]
+                                      {
+                                          existingModel,
+                                      }, sourceFilePath);
+
+            var strategy = new StochasticSoilModelUpdateData();
+
+            // Call
+            strategy.UpdateModelWithImportedData(new[] { readModel }, sourceFilePath, targetCollection, NotifyProgress);
+
+            // Assert
+            Assert.AreSame(existingModel, targetCollection.First());
+        }
+
+        private void NotifyProgress(string stepName, int stepNr, int totalNr) {}
+    }
+}
\ No newline at end of file
Index: Ringtoets/Piping/test/Ringtoets.Piping.Plugin.Test/Ringtoets.Piping.Plugin.Test.csproj
===================================================================
diff -u -r6a5d7b40b7ba4dcb73e393075338352d194e97c2 -r5e70f173b3839314912e086b6c1c784b975ee646
--- Ringtoets/Piping/test/Ringtoets.Piping.Plugin.Test/Ringtoets.Piping.Plugin.Test.csproj	(.../Ringtoets.Piping.Plugin.Test.csproj)	(revision 6a5d7b40b7ba4dcb73e393075338352d194e97c2)
+++ Ringtoets/Piping/test/Ringtoets.Piping.Plugin.Test/Ringtoets.Piping.Plugin.Test.csproj	(.../Ringtoets.Piping.Plugin.Test.csproj)	(revision 5e70f173b3839314912e086b6c1c784b975ee646)
@@ -75,6 +75,7 @@
     <Compile Include="FileImporter\StochasticSoilModelImporterTest.cs" />
     <Compile Include="FileImporter\PipingSurfaceLinesCsvImporterTest.cs" />
     <Compile Include="FileImporter\RingtoetsPipingSurfaceLineExtensionsTest.cs" />
+    <Compile Include="FileImporter\StochasticSoilModelUpdateDataTest.cs" />
     <Compile Include="ImportInfos\RingtoetsPipingSurfaceLinesContextImportInfoTest.cs" />
     <Compile Include="ImportInfos\StochasticSoilModelCollectionContextImportInfoTest.cs" />
     <Compile Include="PipingPluginTest.cs" />