Index: Ringtoets/ClosingStructures/test/Ringtoets.ClosingStructures.Plugin.Test/FileImporters/ClosingStructureUpdateDataStrategyTest.cs
===================================================================
diff -u -r8f469f065acb26b785ea45ddeb3ae766b7edd812 -r922d8c8ebb07e20fb0fe567d65f7d2df2bd224c1
--- Ringtoets/ClosingStructures/test/Ringtoets.ClosingStructures.Plugin.Test/FileImporters/ClosingStructureUpdateDataStrategyTest.cs	(.../ClosingStructureUpdateDataStrategyTest.cs)	(revision 8f469f065acb26b785ea45ddeb3ae766b7edd812)
+++ Ringtoets/ClosingStructures/test/Ringtoets.ClosingStructures.Plugin.Test/FileImporters/ClosingStructureUpdateDataStrategyTest.cs	(.../ClosingStructureUpdateDataStrategyTest.cs)	(revision 922d8c8ebb07e20fb0fe567d65f7d2df2bd224c1)
@@ -253,9 +253,10 @@
 
             // Assert
             AssertClosingStructures(readStructure, structure);
-            CollectionAssert.AreEqual(new[]
+            CollectionAssert.AreEqual(new IObservable[]
             {
-                targetCollection
+                targetCollection,
+                structure
             }, affectedObjects);
         }
 
@@ -306,6 +307,7 @@
             CollectionAssert.AreEqual(new IObservable[]
             {
                 failureMechanism.ClosingStructures,
+                structure,
                 calculation.InputParameters,
                 calculation
             }, affectedObjects);
@@ -382,6 +384,7 @@
 
             CollectionAssert.AreEquivalent(new IObservable[]
             {
+                affectedStructure,
                 affectedCalculation,
                 affectedCalculation.InputParameters,
                 targetDataCollection
@@ -435,6 +438,7 @@
             CollectionAssert.AreEquivalent(new IObservable[]
             {
                 structures,
+                affectedStructure,
                 affectedCalculation,
                 affectedCalculation.InputParameters
             }, affectedObjects);
@@ -510,6 +514,7 @@
             CollectionAssert.AreEqual(new IObservable[]
             {
                 failureMechanism.ClosingStructures,
+                structure,
                 calculation.InputParameters,
                 sectionResults[0],
                 sectionResults[1]
Index: Ringtoets/Common/src/Ringtoets.Common.Data/StructureBase.cs
===================================================================
diff -u -rf765cbda8002f3db4b7855ba9933899f7ebcf820 -r922d8c8ebb07e20fb0fe567d65f7d2df2bd224c1
--- Ringtoets/Common/src/Ringtoets.Common.Data/StructureBase.cs	(.../StructureBase.cs)	(revision f765cbda8002f3db4b7855ba9933899f7ebcf820)
+++ Ringtoets/Common/src/Ringtoets.Common.Data/StructureBase.cs	(.../StructureBase.cs)	(revision 922d8c8ebb07e20fb0fe567d65f7d2df2bd224c1)
@@ -20,6 +20,7 @@
 // All rights reserved.
 
 using System;
+using Core.Common.Base;
 using Core.Common.Base.Data;
 using Core.Common.Base.Geometry;
 
@@ -28,7 +29,7 @@
     /// <summary>
     /// Base definition of a structure.
     /// </summary>
-    public abstract class StructureBase
+    public abstract class StructureBase : Observable
     {
         /// <summary>
         /// Creates a new instance of <see cref="StructureBase"/>.
Index: Ringtoets/Common/src/Ringtoets.Common.Data/UpdateDataStrategies/UpdateDataStrategyBase.cs
===================================================================
diff -u -rb7f91e5d6aaac3c9a52cfda9b1bdd3a74ee4f8b1 -r922d8c8ebb07e20fb0fe567d65f7d2df2bd224c1
--- Ringtoets/Common/src/Ringtoets.Common.Data/UpdateDataStrategies/UpdateDataStrategyBase.cs	(.../UpdateDataStrategyBase.cs)	(revision b7f91e5d6aaac3c9a52cfda9b1bdd3a74ee4f8b1)
+++ Ringtoets/Common/src/Ringtoets.Common.Data/UpdateDataStrategies/UpdateDataStrategyBase.cs	(.../UpdateDataStrategyBase.cs)	(revision 922d8c8ebb07e20fb0fe567d65f7d2df2bd224c1)
@@ -41,7 +41,7 @@
     /// <typeparam name="TTargetData">The target data type.</typeparam>
     /// <typeparam name="TFailureMechanism">The failure mechanism in which the target collection should be updated.</typeparam>
     public abstract class UpdateDataStrategyBase<TTargetData, TFailureMechanism>
-        where TTargetData : class
+        where TTargetData : Observable
         where TFailureMechanism : IFailureMechanism
     {
         protected readonly TFailureMechanism FailureMechanism;
@@ -195,6 +195,10 @@
             {
                 TTargetData objectToUpdateFrom = importedDataCollection.Single(importedObject =>
                                                                                    equalityComparer.Equals(importedObject, objectToUpdate));
+                if (!objectToUpdate.Equals(objectToUpdateFrom))
+                {
+                    affectedObjects.Add(objectToUpdate);
+                }
                 affectedObjects.AddRange(UpdateObjectAndDependentData(objectToUpdate, objectToUpdateFrom));
             }
 
Index: Ringtoets/Common/test/Ringtoets.Common.Data.Test/StructureBaseTest.cs
===================================================================
diff -u -r88d043d47b0976fe2e58c10babb5322b605b16da -r922d8c8ebb07e20fb0fe567d65f7d2df2bd224c1
--- Ringtoets/Common/test/Ringtoets.Common.Data.Test/StructureBaseTest.cs	(.../StructureBaseTest.cs)	(revision 88d043d47b0976fe2e58c10babb5322b605b16da)
+++ Ringtoets/Common/test/Ringtoets.Common.Data.Test/StructureBaseTest.cs	(.../StructureBaseTest.cs)	(revision 922d8c8ebb07e20fb0fe567d65f7d2df2bd224c1)
@@ -21,6 +21,7 @@
 
 using System;
 using System.Collections.Generic;
+using Core.Common.Base;
 using Core.Common.Base.Data;
 using Core.Common.Base.Geometry;
 using Core.Common.TestUtil;
@@ -138,6 +139,8 @@
             });
 
             // Assert
+            Assert.IsInstanceOf<Observable>(structure);
+
             Assert.AreEqual("aName", structure.Name);
             Assert.AreEqual("anId", structure.Id);
             Assert.AreEqual(location.X, structure.Location.X);
Index: Ringtoets/HeightStructures/test/Ringtoets.HeightStructures.Plugin.Test/FileImporters/HeightStructureUpdateDataStrategyTest.cs
===================================================================
diff -u -r6077633f3df6394b0af989aaa1d252773fdff297 -r922d8c8ebb07e20fb0fe567d65f7d2df2bd224c1
--- Ringtoets/HeightStructures/test/Ringtoets.HeightStructures.Plugin.Test/FileImporters/HeightStructureUpdateDataStrategyTest.cs	(.../HeightStructureUpdateDataStrategyTest.cs)	(revision 6077633f3df6394b0af989aaa1d252773fdff297)
+++ Ringtoets/HeightStructures/test/Ringtoets.HeightStructures.Plugin.Test/FileImporters/HeightStructureUpdateDataStrategyTest.cs	(.../HeightStructureUpdateDataStrategyTest.cs)	(revision 922d8c8ebb07e20fb0fe567d65f7d2df2bd224c1)
@@ -253,9 +253,10 @@
 
             // Assert
             AssertHeightStructures(readStructure, structure);
-            CollectionAssert.AreEqual(new[]
+            CollectionAssert.AreEqual(new IObservable[]
             {
-                targetCollection
+                targetCollection,
+                structure
             }, affectedObjects);
         }
 
@@ -306,6 +307,7 @@
             CollectionAssert.AreEqual(new IObservable[]
             {
                 failureMechanism.HeightStructures,
+                structure,
                 calculation.InputParameters,
                 calculation
             }, affectedObjects);
@@ -382,6 +384,7 @@
 
             CollectionAssert.AreEquivalent(new IObservable[]
             {
+                affectedStructure,
                 affectedCalculation,
                 affectedCalculation.InputParameters,
                 targetDataCollection
@@ -434,6 +437,7 @@
             // Assert
             CollectionAssert.AreEquivalent(new IObservable[]
             {
+                affectedStructure,
                 structures,
                 affectedCalculation,
                 affectedCalculation.InputParameters
@@ -510,6 +514,7 @@
             CollectionAssert.AreEqual(new IObservable[]
             {
                 failureMechanism.HeightStructures,
+                structure,
                 calculation.InputParameters,
                 sectionResults[0],
                 sectionResults[1]
Index: Ringtoets/Integration/src/Ringtoets.Integration.Plugin/FileImporters/ForeshoreProfileUpdateDataStrategy.cs
===================================================================
diff -u -r474b2334202ee2bfbe8df476845bd7e2fca01803 -r922d8c8ebb07e20fb0fe567d65f7d2df2bd224c1
--- Ringtoets/Integration/src/Ringtoets.Integration.Plugin/FileImporters/ForeshoreProfileUpdateDataStrategy.cs	(.../ForeshoreProfileUpdateDataStrategy.cs)	(revision 474b2334202ee2bfbe8df476845bd7e2fca01803)
+++ Ringtoets/Integration/src/Ringtoets.Integration.Plugin/FileImporters/ForeshoreProfileUpdateDataStrategy.cs	(.../ForeshoreProfileUpdateDataStrategy.cs)	(revision 922d8c8ebb07e20fb0fe567d65f7d2df2bd224c1)
@@ -62,7 +62,6 @@
             if (!objectToUpdate.Equals(objectToUpdateFrom))
             {
                 objectToUpdate.CopyProperties(objectToUpdateFrom);
-                affectedObjects.Add(objectToUpdate);
 
                 IEnumerable<ICalculation<ICalculationInput>> affectedCalculations = GetAffectedCalculationWithSurfaceLines(objectToUpdate);
 
Index: Ringtoets/Piping/src/Ringtoets.Piping.Plugin/FileImporter/RingtoetsPipingSurfaceLineUpdateDataStrategy.cs
===================================================================
diff -u -r9da080f738eb93fe40ed2a855753ea9c455063bc -r922d8c8ebb07e20fb0fe567d65f7d2df2bd224c1
--- Ringtoets/Piping/src/Ringtoets.Piping.Plugin/FileImporter/RingtoetsPipingSurfaceLineUpdateDataStrategy.cs	(.../RingtoetsPipingSurfaceLineUpdateDataStrategy.cs)	(revision 9da080f738eb93fe40ed2a855753ea9c455063bc)
+++ Ringtoets/Piping/src/Ringtoets.Piping.Plugin/FileImporter/RingtoetsPipingSurfaceLineUpdateDataStrategy.cs	(.../RingtoetsPipingSurfaceLineUpdateDataStrategy.cs)	(revision 922d8c8ebb07e20fb0fe567d65f7d2df2bd224c1)
@@ -100,10 +100,7 @@
         {
             IEnumerable<PipingCalculation> affectedCalculations = GetAffectedCalculationWithSurfaceLine(surfaceLine);
 
-            var affectedObjects = new List<IObservable>
-            {
-                surfaceLine
-            };
+            var affectedObjects = new List<IObservable>();
             foreach (PipingCalculation affectedCalculation in affectedCalculations)
             {
                 affectedObjects.AddRange(RingtoetsCommonDataSynchronizationService.ClearCalculationOutput(affectedCalculation));
Index: Ringtoets/Piping/src/Ringtoets.Piping.Plugin/FileImporter/StochasticSoilModelUpdateDataStrategy.cs
===================================================================
diff -u -r50597fbeb76b752bc250107dfa91b696bb6c4995 -r922d8c8ebb07e20fb0fe567d65f7d2df2bd224c1
--- Ringtoets/Piping/src/Ringtoets.Piping.Plugin/FileImporter/StochasticSoilModelUpdateDataStrategy.cs	(.../StochasticSoilModelUpdateDataStrategy.cs)	(revision 50597fbeb76b752bc250107dfa91b696bb6c4995)
+++ Ringtoets/Piping/src/Ringtoets.Piping.Plugin/FileImporter/StochasticSoilModelUpdateDataStrategy.cs	(.../StochasticSoilModelUpdateDataStrategy.cs)	(revision 922d8c8ebb07e20fb0fe567d65f7d2df2bd224c1)
@@ -97,10 +97,7 @@
 
             StochasticSoilModelProfileDifference difference = modelToUpdate.Update(modelToUpdateFrom);
 
-            var affectedObjects = new List<IObservable>
-            {
-                modelToUpdate
-            };
+            var affectedObjects = new List<IObservable>();
             foreach (StochasticSoilProfile removedProfile in difference.RemovedProfiles)
             {
                 affectedObjects.AddRange(PipingDataSynchronizationService.RemoveStochasticSoilProfileFromInput(FailureMechanism, removedProfile));