Index: Riskeer/Common/src/Riskeer.Common.Data/AssemblyTool/FailureMechanismSectionAssemblyResultFactory.cs
===================================================================
diff -u -r6a448aca43aee6e9ee31fbaef4f6421d49cbb871 -rc21286c9d5b44af209d059015c1a480e873d2da7
--- Riskeer/Common/src/Riskeer.Common.Data/AssemblyTool/FailureMechanismSectionAssemblyResultFactory.cs	(.../FailureMechanismSectionAssemblyResultFactory.cs)	(revision 6a448aca43aee6e9ee31fbaef4f6421d49cbb871)
+++ Riskeer/Common/src/Riskeer.Common.Data/AssemblyTool/FailureMechanismSectionAssemblyResultFactory.cs	(.../FailureMechanismSectionAssemblyResultFactory.cs)	(revision c21286c9d5b44af209d059015c1a480e873d2da7)
@@ -236,7 +236,7 @@
         {
             if (probabilityRefinementType == ProbabilityRefinementType.Profile)
             {
-                refinedSectionProbability = refinedProfileProbability * sectionN;
+                refinedSectionProbability = Math.Min(1.0, refinedProfileProbability * sectionN);
             }
 
             if (probabilityRefinementType == ProbabilityRefinementType.Section)
Index: Riskeer/Common/test/Riskeer.Common.Data.Test/AssemblyTool/FailureMechanismSectionAssemblyResultFactoryTest.cs
===================================================================
diff -u -rec2c838182ed237b3abd753347a861857129331b -rc21286c9d5b44af209d059015c1a480e873d2da7
--- Riskeer/Common/test/Riskeer.Common.Data.Test/AssemblyTool/FailureMechanismSectionAssemblyResultFactoryTest.cs	(.../FailureMechanismSectionAssemblyResultFactoryTest.cs)	(revision ec2c838182ed237b3abd753347a861857129331b)
+++ Riskeer/Common/test/Riskeer.Common.Data.Test/AssemblyTool/FailureMechanismSectionAssemblyResultFactoryTest.cs	(.../FailureMechanismSectionAssemblyResultFactoryTest.cs)	(revision c21286c9d5b44af209d059015c1a480e873d2da7)
@@ -258,17 +258,20 @@
         }
 
         [Test]
-        [TestCase(ProbabilityRefinementType.Profile)]
-        [TestCase(ProbabilityRefinementType.Section)]
-        [TestCase(ProbabilityRefinementType.Both)]
+        [TestCase(ProbabilityRefinementType.Profile, 1)]
+        [TestCase(ProbabilityRefinementType.Profile, 10)]
+        [TestCase(ProbabilityRefinementType.Section, 1)]
+        [TestCase(ProbabilityRefinementType.Section, 10)]
+        [TestCase(ProbabilityRefinementType.Both, 1)]
+        [TestCase(ProbabilityRefinementType.Both, 10)]
         public void AssembleSectionAdoptableWithProfileProbability_WithInputAndUseLengthEffectTrueAndVariousProbabilityRefinementType_SetsInputOnCalculator(
-            ProbabilityRefinementType probabilityRefinementType)
+            ProbabilityRefinementType probabilityRefinementType,
+            double sectionN)
         {
             // Setup
             var random = new Random(21);
             double refinedSectionProbability = random.NextDouble();
             double refinedProfileProbability = random.NextDouble();
-            double sectionN = random.NextDouble();
 
             var mocks = new MockRepository();
             var calculateStrategy = mocks.Stub<IFailureMechanismSectionResultCalculateProbabilityStrategy>();
@@ -298,7 +301,7 @@
                 {
                     case ProbabilityRefinementType.Profile:
                         Assert.AreEqual(refinedProfileProbability, calculatorInput.RefinedProfileProbability);
-                        Assert.AreEqual(refinedProfileProbability * sectionN, calculatorInput.RefinedSectionProbability);
+                        Assert.AreEqual(Math.Min(1.0, refinedProfileProbability * sectionN), calculatorInput.RefinedSectionProbability);
                         break;
                     case ProbabilityRefinementType.Section:
                         Assert.AreEqual(refinedSectionProbability / sectionN, calculatorInput.RefinedProfileProbability);