Index: Ringtoets/ClosingStructures/src/Ringtoets.ClosingStructures.Plugin/ClosingStructuresPlugin.cs
===================================================================
diff -u -r73bb4932d13d36d1cd3cd30d8151f2adf49646f2 -rb050816435baf537ed7e77072c3db76cfac8aeca
--- Ringtoets/ClosingStructures/src/Ringtoets.ClosingStructures.Plugin/ClosingStructuresPlugin.cs	(.../ClosingStructuresPlugin.cs)	(revision 73bb4932d13d36d1cd3cd30d8151f2adf49646f2)
+++ Ringtoets/ClosingStructures/src/Ringtoets.ClosingStructures.Plugin/ClosingStructuresPlugin.cs	(.../ClosingStructuresPlugin.cs)	(revision b050816435baf537ed7e77072c3db76cfac8aeca)
@@ -357,11 +357,13 @@
         private static object[] FailureMechanismEnabledChildNodeObjects(ClosingStructuresFailureMechanismContext context)
         {
             ClosingStructuresFailureMechanism wrappedData = context.WrappedData;
+            IAssessmentSection assessmentSection = context.Parent;
+
             return new object[]
             {
-                new CategoryTreeFolder(RingtoetsCommonFormsResources.FailureMechanism_Inputs_DisplayName, GetInputs(wrappedData, context.Parent), TreeFolderCategory.Input),
-                new ClosingStructuresCalculationGroupContext(wrappedData.CalculationsGroup, null, wrappedData, context.Parent),
-                new CategoryTreeFolder(RingtoetsCommonFormsResources.FailureMechanism_Outputs_DisplayName, GetOutputs(wrappedData, context.Parent), TreeFolderCategory.Output)
+                new CategoryTreeFolder(RingtoetsCommonFormsResources.FailureMechanism_Inputs_DisplayName, GetInputs(wrappedData, assessmentSection), TreeFolderCategory.Input),
+                new ClosingStructuresCalculationGroupContext(wrappedData.CalculationsGroup, null, wrappedData, assessmentSection),
+                new CategoryTreeFolder(RingtoetsCommonFormsResources.FailureMechanism_Outputs_DisplayName, GetOutputs(wrappedData, assessmentSection), TreeFolderCategory.Output)
             };
         }
 
@@ -388,6 +390,7 @@
         {
             return new object[]
             {
+                new FailureMechanismAssemblyCategoriesContext(failureMechanism, assessmentSection, () => failureMechanism.GeneralInput.N), 
                 new ClosingStructuresScenariosContext(failureMechanism.CalculationsGroup, failureMechanism),
                 new ProbabilityFailureMechanismSectionResultContext<ClosingStructuresFailureMechanismSectionResult>(
                     failureMechanism.SectionResults, failureMechanism, assessmentSection),
Index: Ringtoets/ClosingStructures/test/Ringtoets.ClosingStructures.Plugin.Test/TreeNodeInfos/ClosingStructuresFailureMechanismContextTreeNodeInfoTest.cs
===================================================================
diff -u -r4fd4b13639f6d6f3657c02916f60571bf940ee9c -rb050816435baf537ed7e77072c3db76cfac8aeca
--- Ringtoets/ClosingStructures/test/Ringtoets.ClosingStructures.Plugin.Test/TreeNodeInfos/ClosingStructuresFailureMechanismContextTreeNodeInfoTest.cs	(.../ClosingStructuresFailureMechanismContextTreeNodeInfoTest.cs)	(revision 4fd4b13639f6d6f3657c02916f60571bf940ee9c)
+++ Ringtoets/ClosingStructures/test/Ringtoets.ClosingStructures.Plugin.Test/TreeNodeInfos/ClosingStructuresFailureMechanismContextTreeNodeInfoTest.cs	(.../ClosingStructuresFailureMechanismContextTreeNodeInfoTest.cs)	(revision b050816435baf537ed7e77072c3db76cfac8aeca)
@@ -141,17 +141,23 @@
             Assert.AreEqual("Oordeel", outputsFolder.Name);
             Assert.AreEqual(TreeFolderCategory.Output, outputsFolder.Category);
 
-            Assert.AreEqual(3, outputsFolder.Contents.Count());
-            var scenariosContext = (ClosingStructuresScenariosContext) outputsFolder.Contents.ElementAt(0);
+            Assert.AreEqual(4, outputsFolder.Contents.Count());
+
+            var failureMechanismAssemblyCategoriesContext = (FailureMechanismAssemblyCategoriesContext) outputsFolder.Contents.ElementAt(0);
+            Assert.AreSame(failureMechanism, failureMechanismAssemblyCategoriesContext.WrappedData);
+            Assert.AreSame(assessmentSection, failureMechanismAssemblyCategoriesContext.AssessmentSection);
+            Assert.AreEqual(failureMechanism.GeneralInput.N, failureMechanismAssemblyCategoriesContext.GetNFunc());
+
+            var scenariosContext = (ClosingStructuresScenariosContext) outputsFolder.Contents.ElementAt(1);
             Assert.AreSame(failureMechanism.CalculationsGroup, scenariosContext.WrappedData);
             Assert.AreSame(failureMechanism, scenariosContext.ParentFailureMechanism);
 
-            var failureMechanismResultsContext = (ProbabilityFailureMechanismSectionResultContext<ClosingStructuresFailureMechanismSectionResult>) outputsFolder.Contents.ElementAt(1);
+            var failureMechanismResultsContext = (ProbabilityFailureMechanismSectionResultContext<ClosingStructuresFailureMechanismSectionResult>) outputsFolder.Contents.ElementAt(2);
             Assert.AreSame(failureMechanism, failureMechanismResultsContext.FailureMechanism);
             Assert.AreSame(failureMechanism.SectionResults, failureMechanismResultsContext.WrappedData);
             Assert.AreSame(assessmentSection, failureMechanismResultsContext.AssessmentSection);
 
-            var outputComment = (Comment) outputsFolder.Contents.ElementAt(2);
+            var outputComment = (Comment) outputsFolder.Contents.ElementAt(3);
             Assert.AreSame(failureMechanism.OutputComments, outputComment);
         }