Index: Ringtoets/AssemblyTool/src/Ringtoets.AssemblyTool.KernelWrapper/Calculators/Assembly/FailureMechanismSectionAssemblyCalculator.cs
===================================================================
diff -u -rf9e6d72ad3907a83b4a4792c2c29a907c1beb018 -r036d78f51fa3dc62d3f8f7045cfb0d05da7607b4
--- Ringtoets/AssemblyTool/src/Ringtoets.AssemblyTool.KernelWrapper/Calculators/Assembly/FailureMechanismSectionAssemblyCalculator.cs	(.../FailureMechanismSectionAssemblyCalculator.cs)	(revision f9e6d72ad3907a83b4a4792c2c29a907c1beb018)
+++ Ringtoets/AssemblyTool/src/Ringtoets.AssemblyTool.KernelWrapper/Calculators/Assembly/FailureMechanismSectionAssemblyCalculator.cs	(.../FailureMechanismSectionAssemblyCalculator.cs)	(revision 036d78f51fa3dc62d3f8f7045cfb0d05da7607b4)
@@ -327,15 +327,19 @@
         {
             try
             {
-                IFailureMechanismSectionAssemblyCalculatorKernel kernel = factory.CreateFailureMechanismSectionAssemblyKernel();
-                FmSectionAssemblyDirectResult output = kernel.TranslateAssessmentResultWbi0T5(
+                ICategoryLimitsCalculator categoriesKernel = factory.CreateAssemblyCategoriesKernel();
+                CategoriesList<FmSectionCategory> categories = categoriesKernel.CalculateFmSectionCategoryLimitsWbi01(
                     new AssessmentSection(1, assemblyCategoriesInput.SignalingNorm, assemblyCategoriesInput.LowerLimitNorm),
-                    new FailureMechanism(assemblyCategoriesInput.N, assemblyCategoriesInput.FailureMechanismContribution),
+                    new FailureMechanism(assemblyCategoriesInput.N, assemblyCategoriesInput.FailureMechanismContribution));
+
+                IFailureMechanismSectionAssemblyCalculatorKernel kernel = factory.CreateFailureMechanismSectionAssemblyKernel();
+                FmSectionAssemblyDirectResultWithProbability output = kernel.TranslateAssessmentResultWbi0T5(
                     failureMechanismSectionN,
                     double.IsNaN(probability) && tailorMadeAssessmentResult == TailorMadeAssessmentProbabilityCalculationResultType.Probability
                         ? EAssessmentResultTypeT3.Gr
                         : FailureMechanismSectionAssemblyCalculatorInputCreator.CreateAssessmentResultTypeT3(tailorMadeAssessmentResult),
-                    probability);
+                    probability,
+                    categories);
 
                 return FailureMechanismSectionAssemblyCreator.Create(output);
             }
Index: Ringtoets/AssemblyTool/test/Ringtoets.AssemblyTool.KernelWrapper.Test/Calculators/Assembly/FailureMechanismSectionAssemblyCalculatorTest.cs
===================================================================
diff -u -rf9e6d72ad3907a83b4a4792c2c29a907c1beb018 -r036d78f51fa3dc62d3f8f7045cfb0d05da7607b4
--- Ringtoets/AssemblyTool/test/Ringtoets.AssemblyTool.KernelWrapper.Test/Calculators/Assembly/FailureMechanismSectionAssemblyCalculatorTest.cs	(.../FailureMechanismSectionAssemblyCalculatorTest.cs)	(revision f9e6d72ad3907a83b4a4792c2c29a907c1beb018)
+++ Ringtoets/AssemblyTool/test/Ringtoets.AssemblyTool.KernelWrapper.Test/Calculators/Assembly/FailureMechanismSectionAssemblyCalculatorTest.cs	(.../FailureMechanismSectionAssemblyCalculatorTest.cs)	(revision 036d78f51fa3dc62d3f8f7045cfb0d05da7607b4)
@@ -1735,9 +1735,12 @@
             using (new AssemblyToolKernelFactoryConfig())
             {
                 var factory = (TestAssemblyToolKernelFactory) AssemblyToolKernelFactory.Instance;
+                AssemblyCategoriesKernelStub categoriesKernel = factory.LastCreatedAssemblyCategoriesKernel;
+                categoriesKernel.FailureMechanismSectionCategoriesOutputWbi01 = CategoriesListTestFactory.CreateFailureMechanismSectionCategories();
+
                 FailureMechanismSectionAssemblyKernelStub kernel = factory.LastCreatedFailureMechanismSectionAssemblyKernel;
-                kernel.FailureMechanismSectionDirectResult = new FmSectionAssemblyDirectResult(random.NextEnumValue<EFmSectionCategory>(),
-                                                                                               random.NextDouble());
+                kernel.FailureMechanismAssemblyDirectResultWithProbability = new FmSectionAssemblyDirectResultWithProbability(random.NextEnumValue<EFmSectionCategory>(),
+                                                                                                                              random.NextDouble());
 
                 var calculator = new FailureMechanismSectionAssemblyCalculator(factory);
 
@@ -1749,7 +1752,10 @@
                 Assert.AreEqual(expectedResultType, kernel.AssessmentResultTypeT3Input);
                 Assert.AreEqual(probability, kernel.FailureProbabilityInput);
                 Assert.AreEqual(n, kernel.LengthEffectFactorInput);
-                AssertAssemblyCategoriesInput(assemblyCategoriesInput, kernel);
+                AssertAssemblyCategoriesInput(assemblyCategoriesInput,
+                                              categoriesKernel,
+                                              categoriesKernel.FailureMechanismSectionCategoriesOutputWbi01,
+                                              kernel);
             }
         }
 
@@ -1764,9 +1770,12 @@
             using (new AssemblyToolKernelFactoryConfig())
             {
                 var factory = (TestAssemblyToolKernelFactory) AssemblyToolKernelFactory.Instance;
+                AssemblyCategoriesKernelStub categoriesKernel = factory.LastCreatedAssemblyCategoriesKernel;
+                categoriesKernel.FailureMechanismSectionCategoriesOutputWbi01 = CategoriesListTestFactory.CreateFailureMechanismSectionCategories();
+
                 FailureMechanismSectionAssemblyKernelStub kernel = factory.LastCreatedFailureMechanismSectionAssemblyKernel;
-                kernel.FailureMechanismSectionDirectResult = new FmSectionAssemblyDirectResult(random.NextEnumValue<EFmSectionCategory>(),
-                                                                                               random.NextDouble());
+                kernel.FailureMechanismAssemblyDirectResultWithProbability = new FmSectionAssemblyDirectResultWithProbability(random.NextEnumValue<EFmSectionCategory>(),
+                                                                                                                              random.NextDouble());
 
                 var calculator = new FailureMechanismSectionAssemblyCalculator(factory);
 
@@ -1780,7 +1789,10 @@
                 Assert.AreEqual(EAssessmentResultTypeT3.Gr, kernel.AssessmentResultTypeT3Input);
                 Assert.IsNaN(kernel.FailureProbabilityInput);
                 Assert.AreEqual(n, kernel.LengthEffectFactorInput);
-                AssertAssemblyCategoriesInput(assemblyCategoriesInput, kernel);
+                AssertAssemblyCategoriesInput(assemblyCategoriesInput,
+                                              categoriesKernel,
+                                              categoriesKernel.FailureMechanismSectionCategoriesOutputWbi01,
+                                              kernel);
             }
         }
 
@@ -1793,8 +1805,8 @@
             {
                 var factory = (TestAssemblyToolKernelFactory) AssemblyToolKernelFactory.Instance;
                 FailureMechanismSectionAssemblyKernelStub kernel = factory.LastCreatedFailureMechanismSectionAssemblyKernel;
-                kernel.FailureMechanismSectionDirectResult = new FmSectionAssemblyDirectResult(random.NextEnumValue<EFmSectionCategory>(),
-                                                                                               random.NextDouble());
+                kernel.FailureMechanismAssemblyDirectResultWithProbability = new FmSectionAssemblyDirectResultWithProbability(random.NextEnumValue<EFmSectionCategory>(),
+                                                                                                                              random.NextDouble());
 
                 var calculator = new FailureMechanismSectionAssemblyCalculator(factory);
 
@@ -1806,7 +1818,7 @@
                     CreateAssemblyCategoriesInput());
 
                 // Assert
-                AssertCalculatorOutput(kernel.FailureMechanismSectionDirectResult, assembly);
+                AssertCalculatorOutput(kernel.FailureMechanismAssemblyDirectResultWithProbability, assembly);
             }
         }
 
@@ -1819,8 +1831,8 @@
             {
                 var factory = (TestAssemblyToolKernelFactory) AssemblyToolKernelFactory.Instance;
                 FailureMechanismSectionAssemblyKernelStub kernel = factory.LastCreatedFailureMechanismSectionAssemblyKernel;
-                kernel.FailureMechanismSectionDirectResult = new FmSectionAssemblyDirectResult((EFmSectionCategory) 99,
-                                                                                               random.NextDouble());
+                kernel.FailureMechanismAssemblyDirectResultWithProbability = new FmSectionAssemblyDirectResultWithProbability((EFmSectionCategory) 99,
+                                                                                                                              random.NextDouble());
 
                 var calculator = new FailureMechanismSectionAssemblyCalculator(factory);