Index: Demo/Ringtoets/src/Demo.Ringtoets/Commands/AddNewDemoAssessmentSectionCommand.cs
===================================================================
diff -u -ra59b471e3b6a02319f91b7317b3814a099ef0221 -r76a7de2e77e45645d0e7e485e03333baf9cc3b0d
--- Demo/Ringtoets/src/Demo.Ringtoets/Commands/AddNewDemoAssessmentSectionCommand.cs	(.../AddNewDemoAssessmentSectionCommand.cs)	(revision a59b471e3b6a02319f91b7317b3814a099ef0221)
+++ Demo/Ringtoets/src/Demo.Ringtoets/Commands/AddNewDemoAssessmentSectionCommand.cs	(.../AddNewDemoAssessmentSectionCommand.cs)	(revision 76a7de2e77e45645d0e7e485e03333baf9cc3b0d)
@@ -553,7 +553,7 @@
                                                                            Path.Combine(embeddedResourceFileWriter.TargetFolderPath,
                                                                                         "DR6.soil"),
                                                                            new StochasticSoilModelReplaceDataStrategy(),
-                                                                           new StochasticSoilModelChangeHandler());
+                                                                           new StochasticSoilModelChangeHandler(pipingFailureMechanism));
                 soilProfilesImporter.Import();
             }
 
Index: Ringtoets/Piping/src/Ringtoets.Piping.IO/Importer/IStochasticSoilModelChangeHandler.cs
===================================================================
diff -u -ra59b471e3b6a02319f91b7317b3814a099ef0221 -r76a7de2e77e45645d0e7e485e03333baf9cc3b0d
--- Ringtoets/Piping/src/Ringtoets.Piping.IO/Importer/IStochasticSoilModelChangeHandler.cs	(.../IStochasticSoilModelChangeHandler.cs)	(revision a59b471e3b6a02319f91b7317b3814a099ef0221)
+++ Ringtoets/Piping/src/Ringtoets.Piping.IO/Importer/IStochasticSoilModelChangeHandler.cs	(.../IStochasticSoilModelChangeHandler.cs)	(revision 76a7de2e77e45645d0e7e485e03333baf9cc3b0d)
@@ -21,10 +21,25 @@
 
 namespace Ringtoets.Piping.IO.Importer
 {
+    /// <summary>
+    /// Interface for verifying and handling changes as an effect of a change to the stochastic 
+    /// soil model collection.
+    /// </summary>
     public interface IStochasticSoilModelChangeHandler
     {
+        /// <summary>
+        /// Verifies whether the change to the stochastic soil model collections has side-effects;
+        /// and therefore a confirmation is required.
+        /// </summary>
+        /// <returns><c>true</c> if confirmation is required, <c>false</c> otherwise.</returns>
         bool RequireConfirmation();
 
+        /// <summary>
+        /// Inquires for a confirmation.
+        /// </summary>
+        /// <returns><c>true</c> if confirmation is given; <c>false</c> otherwise.</returns>
+        /// <remarks>Should only be called when <see cref="RequireConfirmation"/> returns <c>true</c>.
+        /// </remarks>
         bool InquireConfirmation();
     }
 }
\ No newline at end of file
Index: Ringtoets/Piping/src/Ringtoets.Piping.Plugin/FileImporter/StochasticSoilModelChangeHandler.cs
===================================================================
diff -u -ra59b471e3b6a02319f91b7317b3814a099ef0221 -r76a7de2e77e45645d0e7e485e03333baf9cc3b0d
--- Ringtoets/Piping/src/Ringtoets.Piping.Plugin/FileImporter/StochasticSoilModelChangeHandler.cs	(.../StochasticSoilModelChangeHandler.cs)	(revision a59b471e3b6a02319f91b7317b3814a099ef0221)
+++ Ringtoets/Piping/src/Ringtoets.Piping.Plugin/FileImporter/StochasticSoilModelChangeHandler.cs	(.../StochasticSoilModelChangeHandler.cs)	(revision 76a7de2e77e45645d0e7e485e03333baf9cc3b0d)
@@ -19,20 +19,54 @@
 // 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 System.Windows.Forms;
+using Ringtoets.Piping.Data;
 using Ringtoets.Piping.IO.Importer;
+using Ringtoets.Piping.Plugin.Properties;
+using CoreCommonBaseResources = Core.Common.Base.Properties.Resources;
 
 namespace Ringtoets.Piping.Plugin.FileImporter
 {
+    /// <summary>
+    /// Class which can, if required, inquire the user for a confirmation when a change to the
+    /// stochastic soil model collection requires calculation results to be altered.
+    /// </summary>
     public class StochasticSoilModelChangeHandler : IStochasticSoilModelChangeHandler
     {
+        private readonly PipingFailureMechanism failureMechanism;
+
+        public StochasticSoilModelChangeHandler(PipingFailureMechanism failureMechanism)
+        {
+            if (failureMechanism == null)
+            {
+                throw new ArgumentNullException(nameof(failureMechanism));
+            }
+            this.failureMechanism = failureMechanism;
+        }
+
         public bool RequireConfirmation()
         {
-            return false;
+            IEnumerable<PipingCalculationScenario> calculations = failureMechanism.Calculations.Cast<PipingCalculationScenario>();
+
+            return calculations.Any(HasOutput);
         }
 
+        private static bool HasOutput(PipingCalculationScenario calculation)
+        {
+            return calculation.HasOutput;
+        }
+
         public bool InquireConfirmation()
         {
-            throw new System.NotImplementedException();
+            DialogResult result = MessageBox.Show(
+                Resources.StochasticSoilModelChangeHandler_When_updating_StochasticSoilModel_definitions_assigned_to_calculations_output_will_be_cleared_confirm,
+                CoreCommonBaseResources.Confirm,
+                MessageBoxButtons.OKCancel);
+
+            return result == DialogResult.OK;
         }
     }
 }
\ No newline at end of file
Index: Ringtoets/Piping/src/Ringtoets.Piping.Plugin/PipingPlugin.cs
===================================================================
diff -u -r0ab02f0514e081770486d6a9b1b4fbcd9c92d642 -r76a7de2e77e45645d0e7e485e03333baf9cc3b0d
--- Ringtoets/Piping/src/Ringtoets.Piping.Plugin/PipingPlugin.cs	(.../PipingPlugin.cs)	(revision 0ab02f0514e081770486d6a9b1b4fbcd9c92d642)
+++ Ringtoets/Piping/src/Ringtoets.Piping.Plugin/PipingPlugin.cs	(.../PipingPlugin.cs)	(revision 76a7de2e77e45645d0e7e485e03333baf9cc3b0d)
@@ -119,7 +119,7 @@
                 CreateFileImporter = (context, filePath) => new StochasticSoilModelImporter(context.WrappedData,
                                                                                             filePath,
                                                                                             new StochasticSoilModelReplaceDataStrategy(),
-                                                                                            new StochasticSoilModelChangeHandler())
+                                                                                            new StochasticSoilModelChangeHandler(context.FailureMechanism))
             };
         }
 
@@ -573,7 +573,7 @@
             var importer = new StochasticSoilModelImporter(soilModelCollection,
                                                            sourceFilePath,
                                                            new StochasticSoilModelUpdateDataStrategy(failureMechanism),
-                                                           new StochasticSoilModelChangeHandler());
+                                                           new StochasticSoilModelChangeHandler(failureMechanism));
 
             var activity = new FileImportActivity(importer, PipingPluginResources.PipingPlugin_RunUpdateStochasticSoilModel_Update_StochasticSoilModels);
             ActivityProgressDialogRunner.Run(Gui.MainWindow, activity);
Index: Ringtoets/Piping/src/Ringtoets.Piping.Plugin/Properties/Resources.Designer.cs
===================================================================
diff -u -ra59b471e3b6a02319f91b7317b3814a099ef0221 -r76a7de2e77e45645d0e7e485e03333baf9cc3b0d
--- Ringtoets/Piping/src/Ringtoets.Piping.Plugin/Properties/Resources.Designer.cs	(.../Resources.Designer.cs)	(revision a59b471e3b6a02319f91b7317b3814a099ef0221)
+++ Ringtoets/Piping/src/Ringtoets.Piping.Plugin/Properties/Resources.Designer.cs	(.../Resources.Designer.cs)	(revision 76a7de2e77e45645d0e7e485e03333baf9cc3b0d)
@@ -383,6 +383,16 @@
         }
         
         /// <summary>
+        ///   Looks up a localized string similar to Wanneer ondergrondschematisaties wijzigen als gevolg van het bijwerken, zullen de resultaten van berekeningen die deze ondergrondschematisaties worden verwijderd. Weet u zeker dat u wilt doorgaan?.
+        /// </summary>
+        public static string StochasticSoilModelChangeHandler_When_updating_StochasticSoilModel_definitions_assigned_to_calculations_output_will_be_cleared_confirm {
+            get {
+                return ResourceManager.GetString("StochasticSoilModelChangeHandler_When_updating_StochasticSoilModel_definitions_as" +
+                        "signed_to_calculations_output_will_be_cleared_confirm", resourceCulture);
+            }
+        }
+        
+        /// <summary>
         ///   Looks up a localized string similar to Het stochastische ondergrondmodel &apos;{0}&apos; bestaat al in het toetsspoor..
         /// </summary>
         public static string StochasticSoilModelImporter_AddImportedDataToModel_Stochastisch_soil_model_0_already_exists {
Index: Ringtoets/Piping/src/Ringtoets.Piping.Plugin/Properties/Resources.resx
===================================================================
diff -u -ra59b471e3b6a02319f91b7317b3814a099ef0221 -r76a7de2e77e45645d0e7e485e03333baf9cc3b0d
--- Ringtoets/Piping/src/Ringtoets.Piping.Plugin/Properties/Resources.resx	(.../Resources.resx)	(revision a59b471e3b6a02319f91b7317b3814a099ef0221)
+++ Ringtoets/Piping/src/Ringtoets.Piping.Plugin/Properties/Resources.resx	(.../Resources.resx)	(revision 76a7de2e77e45645d0e7e485e03333baf9cc3b0d)
@@ -220,4 +220,7 @@
   <data name="StochasticSoilModelUpdateDataStrategy_UpdateModelWithImportedData_Update_of_StochasticSoilModel_failed" xml:space="preserve">
     <value>Het bijwerken van de stochastische ondrgrondmodellen is mislukt.</value>
   </data>
+  <data name="StochasticSoilModelChangeHandler_When_updating_StochasticSoilModel_definitions_assigned_to_calculations_output_will_be_cleared_confirm" xml:space="preserve">
+    <value>Wanneer ondergrondschematisaties wijzigen als gevolg van het bijwerken, zullen de resultaten van berekeningen die deze ondergrondschematisaties worden verwijderd. Weet u zeker dat u wilt doorgaan?</value>
+  </data>
 </root>
\ No newline at end of file
Index: Ringtoets/Piping/test/Ringtoets.Piping.Data.Test/PipingSoilProfileTest.cs
===================================================================
diff -u -r34f1b5a53b9c554d1a0a35365da4f8d258117304 -r76a7de2e77e45645d0e7e485e03333baf9cc3b0d
--- Ringtoets/Piping/test/Ringtoets.Piping.Data.Test/PipingSoilProfileTest.cs	(.../PipingSoilProfileTest.cs)	(revision 34f1b5a53b9c554d1a0a35365da4f8d258117304)
+++ Ringtoets/Piping/test/Ringtoets.Piping.Data.Test/PipingSoilProfileTest.cs	(.../PipingSoilProfileTest.cs)	(revision 76a7de2e77e45645d0e7e485e03333baf9cc3b0d)
@@ -302,7 +302,7 @@
 
         private static string GetRandomName(Random random)
         {
-            return string.Join("", Enumerable.Repeat('x', random.Next(0, 40)));
+            return new string('x', random.Next(0, 40));
         }
     }
 }
\ No newline at end of file
Index: Ringtoets/Piping/test/Ringtoets.Piping.Data.Test/StochasticSoilProfileTest.cs
===================================================================
diff -u -r34f1b5a53b9c554d1a0a35365da4f8d258117304 -r76a7de2e77e45645d0e7e485e03333baf9cc3b0d
--- Ringtoets/Piping/test/Ringtoets.Piping.Data.Test/StochasticSoilProfileTest.cs	(.../StochasticSoilProfileTest.cs)	(revision 34f1b5a53b9c554d1a0a35365da4f8d258117304)
+++ Ringtoets/Piping/test/Ringtoets.Piping.Data.Test/StochasticSoilProfileTest.cs	(.../StochasticSoilProfileTest.cs)	(revision 76a7de2e77e45645d0e7e485e03333baf9cc3b0d)
@@ -247,7 +247,7 @@
 
         private static string GetRandomName(Random random)
         {
-            return string.Join("", Enumerable.Repeat('x', random.Next(0, 40)));
+            return new string('x', random.Next(0, 40));
         }
     }
 }
\ No newline at end of file
Index: Ringtoets/Piping/test/Ringtoets.Piping.Plugin.Test/FileImporter/StochasticSoilModelChangeHandlerTest.cs
===================================================================
diff -u -r4dac504d83de712731e5f7ae1116b8e2d27caf06 -r76a7de2e77e45645d0e7e485e03333baf9cc3b0d
--- Ringtoets/Piping/test/Ringtoets.Piping.Plugin.Test/FileImporter/StochasticSoilModelChangeHandlerTest.cs	(.../StochasticSoilModelChangeHandlerTest.cs)	(revision 4dac504d83de712731e5f7ae1116b8e2d27caf06)
+++ Ringtoets/Piping/test/Ringtoets.Piping.Plugin.Test/FileImporter/StochasticSoilModelChangeHandlerTest.cs	(.../StochasticSoilModelChangeHandlerTest.cs)	(revision 76a7de2e77e45645d0e7e485e03333baf9cc3b0d)
@@ -20,48 +20,136 @@
 // All rights reserved.
 
 using System;
+using NUnit.Extensions.Forms;
 using NUnit.Framework;
+using Ringtoets.Piping.Data;
+using Ringtoets.Piping.Data.TestUtil;
 using Ringtoets.Piping.IO.Importer;
+using Ringtoets.Piping.KernelWrapper.TestUtil;
 using Ringtoets.Piping.Plugin.FileImporter;
 
 namespace Ringtoets.Piping.Plugin.Test.FileImporter
 {
     [TestFixture]
-    public class StochasticSoilModelChangeHandlerTest
+    public class StochasticSoilModelChangeHandlerTest : NUnitFormTest
     {
         [Test]
-        public void DefaultConstructor_ImplementedExpectedInterface()
+        public void Constructor_WithoutFailureMechanism_ThrowsArgumentNullException()
         {
             // Call
-            var handler = new StochasticSoilModelChangeHandler();
+            TestDelegate test = () => new StochasticSoilModelChangeHandler(null);
 
             // Assert
+            string paramName = Assert.Throws<ArgumentNullException>(test).ParamName;
+            Assert.AreEqual("failureMechanism", paramName);
+        }
+
+        [Test]
+        public void Constructor_WithFailureMechanism_ImplementsExpectedInterface()
+        {
+            // Call
+            var handler = new StochasticSoilModelChangeHandler(new PipingFailureMechanism());
+
+            // Assert
             Assert.IsInstanceOf<IStochasticSoilModelChangeHandler>(handler);
         }
 
         [Test]
-        public void RequireConfirmation_Always_ReturnFalse()
+        public void RequireConfirmation_FailureMechanismWithCalculationWithoutOutput_ReturnFalse()
         {
             // Setup
-            var handler = new StochasticSoilModelChangeHandler();
+            var failureMechanism = new PipingFailureMechanism();
+            failureMechanism.CalculationsGroup.Children.Add(new PipingCalculationScenario(new GeneralPipingInput()));
 
+            var handler = new StochasticSoilModelChangeHandler(failureMechanism);
+
             // Call
             bool requireConfirmation = handler.RequireConfirmation();
 
             // Assert
             Assert.IsFalse(requireConfirmation);
         }
+
         [Test]
-        public void InquireConfirmation_Always_ThrowsNotImplementedException()
+        public void RequireConfirmation_FailureMechanismWithCalculationWithOutput_ReturnTrue()
         {
             // Setup
-            var handler = new StochasticSoilModelChangeHandler();
+            var failureMechanism = new PipingFailureMechanism();
+            failureMechanism.CalculationsGroup.Children.Add(new PipingCalculationScenario(new GeneralPipingInput())
+            {
+                Output = new TestPipingOutput()
+            });
 
+            var handler = new StochasticSoilModelChangeHandler(failureMechanism);
+
             // Call
-            TestDelegate testDelegate = () => handler.InquireConfirmation();
+            bool requireConfirmation = handler.RequireConfirmation();
 
             // Assert
-            Assert.Throws<NotImplementedException>(testDelegate);
+            Assert.IsTrue(requireConfirmation);
         }
+
+        [Test]
+        public void InquireConfirmation_Always_ShowsConfirmationDialog()
+        {
+            // Setup
+            var handler = new StochasticSoilModelChangeHandler(new PipingFailureMechanism());
+
+            string dialogText = string.Empty; 
+
+            DialogBoxHandler = (name, wnd) =>
+            {
+                var tester = new MessageBoxTester(wnd);
+                dialogText = tester.Text;
+                tester.ClickCancel();
+            };
+
+            // Call
+            handler.InquireConfirmation();
+
+            // Assert
+            const string message = "Wanneer ondergrondschematisaties wijzigen als gevolg van het bijwerken, " +
+                                   "zullen de resultaten van berekeningen die deze ondergrondschematisaties worden " +
+                                   "verwijderd. Weet u zeker dat u wilt doorgaan?";
+            Assert.AreEqual(message, dialogText);
+        }
+
+        [Test]
+        public void InquireConfirmation_PressOkInMessageBox_ReturnsTrue()
+        {
+            // Setup
+            var handler = new StochasticSoilModelChangeHandler(new PipingFailureMechanism());
+            
+            DialogBoxHandler = (name, wnd) =>
+            {
+                var tester = new MessageBoxTester(wnd);
+                tester.ClickOk();
+            };
+
+            // Call
+            var confirmed = handler.InquireConfirmation();
+
+            // Assert
+            Assert.IsTrue(confirmed);
+        }
+
+        [Test]
+        public void InquireConfirmation_PressCancelInMessageBox_ReturnsFalse()
+        {
+            // Setup
+            var handler = new StochasticSoilModelChangeHandler(new PipingFailureMechanism());
+            
+            DialogBoxHandler = (name, wnd) =>
+            {
+                var tester = new MessageBoxTester(wnd);
+                tester.ClickCancel();
+            };
+
+            // Call
+            var confirmed = handler.InquireConfirmation();
+
+            // Assert
+            Assert.IsFalse(confirmed);
+        }
     }
 }
\ No newline at end of file