Index: Ringtoets/AssemblyTool/src/Ringtoets.AssemblyTool.KernelWrapper/Calculators/Assembly/FailureMechanismSectionAssemblyCalculator.cs
===================================================================
diff -u -r9ebd34ca30a20d1b480dd1c19df8a99f23ecbf28 -r3f282c2215f8aa9a287a6eba73868cbd0d30f7e5
--- Ringtoets/AssemblyTool/src/Ringtoets.AssemblyTool.KernelWrapper/Calculators/Assembly/FailureMechanismSectionAssemblyCalculator.cs	(.../FailureMechanismSectionAssemblyCalculator.cs)	(revision 9ebd34ca30a20d1b480dd1c19df8a99f23ecbf28)
+++ Ringtoets/AssemblyTool/src/Ringtoets.AssemblyTool.KernelWrapper/Calculators/Assembly/FailureMechanismSectionAssemblyCalculator.cs	(.../FailureMechanismSectionAssemblyCalculator.cs)	(revision 3f282c2215f8aa9a287a6eba73868cbd0d30f7e5)
@@ -143,7 +143,9 @@
             }
         }
 
-        public FailureMechanismSectionAssembly AssembleTailorMadeAssessment(TailorMadeAssessmentResultType tailorMadeAssessmentResult, double probability, IEnumerable<FailureMechanismSectionAssemblyCategory> categories)
+        public FailureMechanismSectionAssembly AssembleTailorMadeAssessment(TailorMadeAssessmentResultType tailorMadeAssessmentResult,
+                                                                            double probability,
+                                                                            IEnumerable<FailureMechanismSectionAssemblyCategory> categories)
         {
             return FailureMechanismSectionAssemblyCreator.Create(new FailureMechanismSectionAssemblyCategoryResult(
                                                                      FailureMechanismSectionCategoryGroup.VIIv,
Index: Ringtoets/AssemblyTool/test/Ringtoets.AssemblyTool.KernelWrapper.TestUtil.Test/Calculators/Assembly/FailureMechanismSectionAssemblyCalculatorStubTest.cs
===================================================================
diff -u -r2e324b133452743296fdec90f1e80af557c23c39 -r3f282c2215f8aa9a287a6eba73868cbd0d30f7e5
--- Ringtoets/AssemblyTool/test/Ringtoets.AssemblyTool.KernelWrapper.TestUtil.Test/Calculators/Assembly/FailureMechanismSectionAssemblyCalculatorStubTest.cs	(.../FailureMechanismSectionAssemblyCalculatorStubTest.cs)	(revision 2e324b133452743296fdec90f1e80af557c23c39)
+++ Ringtoets/AssemblyTool/test/Ringtoets.AssemblyTool.KernelWrapper.TestUtil.Test/Calculators/Assembly/FailureMechanismSectionAssemblyCalculatorStubTest.cs	(.../FailureMechanismSectionAssemblyCalculatorStubTest.cs)	(revision 3f282c2215f8aa9a287a6eba73868cbd0d30f7e5)
@@ -56,6 +56,9 @@
             Assert.AreEqual(0.0, calculator.TailorMadeAssessmentProbabilityInput);
             Assert.AreEqual((TailorMadeAssessmentResultType) 0, calculator.TailorMadeAssessmentResultInput);
             Assert.IsNull(calculator.TailorMadeAssessmentAssemblyOutput);
+
+            Assert.IsNull(calculator.CombinedAssemblyInput);
+            Assert.IsNull(calculator.CombinedAssemblyOutput);            
         }
 
         #region Simple Assessment
@@ -372,5 +375,75 @@
         }
 
         #endregion
+
+        #region Combined Assembly
+
+        [Test]
+        public void AssembleCombined_ThrowExceptionOnCalculateFalse_ReturnOutput()
+        {
+            // Setup
+            var random = new Random(39);
+            var tailorMadeAssembly = new FailureMechanismSectionAssembly(
+                random.NextDouble(),
+                random.NextEnumValue<FailureMechanismSectionAssemblyCategoryGroup>());
+
+            var calculator = new FailureMechanismSectionAssemblyCalculatorStub();
+            
+
+            // Call
+            FailureMechanismSectionAssembly combinedAssembly = calculator.AssembleCombined(null, null, tailorMadeAssembly);
+
+            // Assert
+            Assert.AreSame(tailorMadeAssembly, combinedAssembly);
+        }
+
+        [Test]
+        public void AssembleCombined_ThrowExceptionOnCalculateFalse_SetsInput()
+        {
+            // Setup
+            var random = new Random(39);
+            var simpleAssembly = new FailureMechanismSectionAssembly(
+                random.NextDouble(),
+                random.NextEnumValue<FailureMechanismSectionAssemblyCategoryGroup>());
+            var detailedAssembly = new FailureMechanismSectionAssembly(
+                random.NextDouble(),
+                random.NextEnumValue<FailureMechanismSectionAssemblyCategoryGroup>());
+            var tailorMadeAssembly = new FailureMechanismSectionAssembly(
+                random.NextDouble(),
+                random.NextEnumValue<FailureMechanismSectionAssemblyCategoryGroup>());
+
+            var calculator = new FailureMechanismSectionAssemblyCalculatorStub();
+
+            // Call
+            calculator.AssembleCombined(simpleAssembly, detailedAssembly, tailorMadeAssembly);
+
+            // Assert
+            CollectionAssert.AreEqual(new[]
+            {
+                simpleAssembly,
+                detailedAssembly,
+                tailorMadeAssembly
+            }, calculator.CombinedAssemblyInput);
+        }
+
+        [Test]
+        public void AssembleCombined_ThrowExceptionOnCalculateTrue_ThrowsFailureMechanismSectionAssemblyCalculatorException()
+        {
+            // Setup
+            var calculator = new FailureMechanismSectionAssemblyCalculatorStub
+            {
+                ThrowExceptionOnCalculate = true
+            };
+
+            // Call
+            TestDelegate test = () => calculator.AssembleCombined(null, null, null);
+
+            // Assert
+            var exception = Assert.Throws<FailureMechanismSectionAssemblyCalculatorException>(test);
+            Assert.AreEqual("Message", exception.Message);
+            Assert.IsNotNull(exception.InnerException);
+        }
+
+        #endregion
     }
 }
\ No newline at end of file
Index: Ringtoets/AssemblyTool/test/Ringtoets.AssemblyTool.KernelWrapper.TestUtil/Calculators/Assembly/FailureMechanismSectionAssemblyCalculatorStub.cs
===================================================================
diff -u -r2e324b133452743296fdec90f1e80af557c23c39 -r3f282c2215f8aa9a287a6eba73868cbd0d30f7e5
--- Ringtoets/AssemblyTool/test/Ringtoets.AssemblyTool.KernelWrapper.TestUtil/Calculators/Assembly/FailureMechanismSectionAssemblyCalculatorStub.cs	(.../FailureMechanismSectionAssemblyCalculatorStub.cs)	(revision 2e324b133452743296fdec90f1e80af557c23c39)
+++ Ringtoets/AssemblyTool/test/Ringtoets.AssemblyTool.KernelWrapper.TestUtil/Calculators/Assembly/FailureMechanismSectionAssemblyCalculatorStub.cs	(.../FailureMechanismSectionAssemblyCalculatorStub.cs)	(revision 3f282c2215f8aa9a287a6eba73868cbd0d30f7e5)
@@ -93,6 +93,16 @@
         public IEnumerable<FailureMechanismSectionAssemblyCategory> TailorMadeAssessmentCategoriesInput { get; private set; }
 
         /// <summary>
+        /// Gets the output of the combined assembly calculation.
+        /// </summary>
+        public FailureMechanismSectionAssembly CombinedAssemblyOutput { get; private set; }
+
+        /// <summary>
+        /// Gets the input of the combined assembly calculation.
+        /// </summary>
+        public IEnumerable<FailureMechanismSectionAssembly> CombinedAssemblyInput { get; private set; }
+
+        /// <summary>
         /// Sets an indicator whether an exception must be thrown when performing a calculation.
         /// </summary>
         public bool ThrowExceptionOnCalculate { private get; set; }
@@ -153,7 +163,9 @@
             return DetailedAssessmentAssemblyOutput = new FailureMechanismSectionAssembly(0, FailureMechanismSectionAssemblyCategoryGroup.VIv);
         }
 
-        public FailureMechanismSectionAssembly AssembleTailorMadeAssessment(TailorMadeAssessmentResultType tailorMadeAssessmentResult, double probability, IEnumerable<FailureMechanismSectionAssemblyCategory> categories)
+        public FailureMechanismSectionAssembly AssembleTailorMadeAssessment(TailorMadeAssessmentResultType tailorMadeAssessmentResult,
+                                                                            double probability,
+                                                                            IEnumerable<FailureMechanismSectionAssemblyCategory> categories)
         {
             if (ThrowExceptionOnCalculate)
             {
@@ -166,5 +178,24 @@
 
             return TailorMadeAssessmentAssemblyOutput = new FailureMechanismSectionAssembly(1, FailureMechanismSectionAssemblyCategoryGroup.VIv);
         }
+
+        public FailureMechanismSectionAssembly AssembleCombined(FailureMechanismSectionAssembly simpleAssembly,
+                                                                FailureMechanismSectionAssembly detailedAssembly,
+                                                                FailureMechanismSectionAssembly tailorMadeAssembly)
+        {
+            if (ThrowExceptionOnCalculate)
+            {
+                throw new FailureMechanismSectionAssemblyCalculatorException("Message", new Exception());
+            }
+
+            CombinedAssemblyInput = new List<FailureMechanismSectionAssembly>
+            {
+                simpleAssembly,
+                detailedAssembly,
+                tailorMadeAssembly
+            };
+
+            return CombinedAssemblyOutput = tailorMadeAssembly;
+        }
     }
 }
\ No newline at end of file