Index: Riskeer/Common/src/Riskeer.Common.Forms/Views/AdoptableWithProfileProbabilityFailureMechanismSectionResultRow.cs
===================================================================
diff -u -r712e462c20fd4a4b41cdc7df9731b6b50789909d -rb2a84d4ad12dde705c07722ef9c264b268bec879
--- Riskeer/Common/src/Riskeer.Common.Forms/Views/AdoptableWithProfileProbabilityFailureMechanismSectionResultRow.cs	(.../AdoptableWithProfileProbabilityFailureMechanismSectionResultRow.cs)	(revision 712e462c20fd4a4b41cdc7df9731b6b50789909d)
+++ Riskeer/Common/src/Riskeer.Common.Forms/Views/AdoptableWithProfileProbabilityFailureMechanismSectionResultRow.cs	(.../AdoptableWithProfileProbabilityFailureMechanismSectionResultRow.cs)	(revision b2a84d4ad12dde705c07722ef9c264b268bec879)
@@ -52,7 +52,7 @@
 
         private readonly IFailureMechanismSectionResultCalculateProbabilityStrategy calculateProbabilityStrategy;
         private readonly IInitialFailureMechanismResultErrorProvider initialFailureMechanismResultErrorProvider;
-        private readonly Func<double> getNFunc;
+        private readonly ILengthEffectProvider lengthEffectProvider;
         private readonly IAssessmentSection assessmentSection;
 
         /// <summary>
@@ -63,15 +63,15 @@
         /// <param name="calculateProbabilityStrategy">The strategy used to calculate probabilities.</param>
         /// <param name="initialFailureMechanismResultErrorProvider">The error provider to use for
         /// the initial failure mechanism result.</param>
-        /// <param name="getNFunc">The <see cref="Func{TResult}"/> to get the N.</param>
+        /// <param name="lengthEffectProvider">The provider to get the length effect properties.</param>
         /// <param name="assessmentSection">The assessment section the section result belongs to.</param>
         /// <param name="constructionProperties">The property values required to create an instance of
         /// <see cref="AdoptableWithProfileProbabilityFailureMechanismSectionResultRow"/>.</param>
         /// <exception cref="ArgumentNullException">Throw when any parameter is <c>null</c>.</exception>
         public AdoptableWithProfileProbabilityFailureMechanismSectionResultRow(AdoptableWithProfileProbabilityFailureMechanismSectionResult sectionResult,
                                                                                IFailureMechanismSectionResultCalculateProbabilityStrategy calculateProbabilityStrategy,
                                                                                IInitialFailureMechanismResultErrorProvider initialFailureMechanismResultErrorProvider,
-                                                                               Func<double> getNFunc,
+                                                                               ILengthEffectProvider lengthEffectProvider,
                                                                                IAssessmentSection assessmentSection,
                                                                                ConstructionProperties constructionProperties)
             : base(sectionResult)
@@ -86,9 +86,9 @@
                 throw new ArgumentNullException(nameof(initialFailureMechanismResultErrorProvider));
             }
 
-            if (getNFunc == null)
+            if (lengthEffectProvider == null)
             {
-                throw new ArgumentNullException(nameof(getNFunc));
+                throw new ArgumentNullException(nameof(lengthEffectProvider));
             }
 
             if (assessmentSection == null)
@@ -103,7 +103,7 @@
 
             this.calculateProbabilityStrategy = calculateProbabilityStrategy;
             this.initialFailureMechanismResultErrorProvider = initialFailureMechanismResultErrorProvider;
-            this.getNFunc = getNFunc;
+            this.lengthEffectProvider = lengthEffectProvider;
             this.assessmentSection = assessmentSection;
 
             initialFailureMechanismResultIndex = constructionProperties.InitialFailureMechanismResultIndex;
@@ -308,7 +308,7 @@
                     assessmentSection, IsRelevant, InitialFailureMechanismResult, InitialFailureMechanismResultProfileProbability,
                     InitialFailureMechanismResultSectionProbability, FurtherAnalysisNeeded,
                     SectionResult.RefinedProfileProbability, SectionResult.RefinedSectionProbability,
-                    ProbabilityRefinementType, getNFunc());
+                    ProbabilityRefinementType, lengthEffectProvider.SectionN);
             }
             catch (AssemblyException e)
             {
Index: Riskeer/Common/test/Riskeer.Common.Forms.Test/Views/AdoptableWithProfileProbabilityFailureMechanismSectionResultRowTest.cs
===================================================================
diff -u -r712e462c20fd4a4b41cdc7df9731b6b50789909d -rb2a84d4ad12dde705c07722ef9c264b268bec879
--- Riskeer/Common/test/Riskeer.Common.Forms.Test/Views/AdoptableWithProfileProbabilityFailureMechanismSectionResultRowTest.cs	(.../AdoptableWithProfileProbabilityFailureMechanismSectionResultRowTest.cs)	(revision 712e462c20fd4a4b41cdc7df9731b6b50789909d)
+++ Riskeer/Common/test/Riskeer.Common.Forms.Test/Views/AdoptableWithProfileProbabilityFailureMechanismSectionResultRowTest.cs	(.../AdoptableWithProfileProbabilityFailureMechanismSectionResultRowTest.cs)	(revision b2a84d4ad12dde705c07722ef9c264b268bec879)
@@ -69,14 +69,15 @@
             // Setup
             var mocks = new MockRepository();
             var errorProvider = mocks.Stub<IInitialFailureMechanismResultErrorProvider>();
+            var lengthEffectProvider = mocks.Stub<ILengthEffectProvider>();
             var assessmentSection = mocks.Stub<IAssessmentSection>();
             mocks.ReplayAll();
 
             FailureMechanismSection section = FailureMechanismSectionTestFactory.CreateFailureMechanismSection();
             var result = new AdoptableWithProfileProbabilityFailureMechanismSectionResult(section);
 
             // Call
-            void Call() => new AdoptableWithProfileProbabilityFailureMechanismSectionResultRow(result, null, errorProvider, () => double.NaN, assessmentSection, ConstructionProperties);
+            void Call() => new AdoptableWithProfileProbabilityFailureMechanismSectionResultRow(result, null, errorProvider, lengthEffectProvider, assessmentSection, ConstructionProperties);
 
             // Assert
             var exception = Assert.Throws<ArgumentNullException>(Call);
@@ -90,14 +91,15 @@
             // Setup
             var mocks = new MockRepository();
             var calculateStrategy = mocks.Stub<IFailureMechanismSectionResultCalculateProbabilityStrategy>();
+            var lengthEffectProvider = mocks.Stub<ILengthEffectProvider>();
             var assessmentSection = mocks.Stub<IAssessmentSection>();
             mocks.ReplayAll();
 
             FailureMechanismSection section = FailureMechanismSectionTestFactory.CreateFailureMechanismSection();
             var result = new AdoptableWithProfileProbabilityFailureMechanismSectionResult(section);
 
             // Call
-            void Call() => new AdoptableWithProfileProbabilityFailureMechanismSectionResultRow(result, calculateStrategy, null, () => double.NaN, assessmentSection, ConstructionProperties);
+            void Call() => new AdoptableWithProfileProbabilityFailureMechanismSectionResultRow(result, calculateStrategy, null, lengthEffectProvider, assessmentSection, ConstructionProperties);
 
             // Assert
             var exception = Assert.Throws<ArgumentNullException>(Call);
@@ -106,7 +108,7 @@
         }
 
         [Test]
-        public void Constructor_GetNFuncNull_ThrowsArgumentNullException()
+        public void Constructor_LengthEffectProviderNull_ThrowsArgumentNullException()
         {
             // Setup
             var mocks = new MockRepository();
@@ -123,7 +125,7 @@
 
             // Assert
             var exception = Assert.Throws<ArgumentNullException>(Call);
-            Assert.AreEqual("getNFunc", exception.ParamName);
+            Assert.AreEqual("lengthEffectProvider", exception.ParamName);
             mocks.VerifyAll();
         }
 
@@ -134,13 +136,14 @@
             var mocks = new MockRepository();
             var calculateStrategy = mocks.Stub<IFailureMechanismSectionResultCalculateProbabilityStrategy>();
             var errorProvider = mocks.Stub<IInitialFailureMechanismResultErrorProvider>();
+            var lengthEffectProvider = mocks.Stub<ILengthEffectProvider>();
             mocks.ReplayAll();
 
             FailureMechanismSection section = FailureMechanismSectionTestFactory.CreateFailureMechanismSection();
             var result = new AdoptableWithProfileProbabilityFailureMechanismSectionResult(section);
 
             // Call
-            void Call() => new AdoptableWithProfileProbabilityFailureMechanismSectionResultRow(result, calculateStrategy, errorProvider, () => double.NaN, null, ConstructionProperties);
+            void Call() => new AdoptableWithProfileProbabilityFailureMechanismSectionResultRow(result, calculateStrategy, errorProvider, lengthEffectProvider, null, ConstructionProperties);
 
             // Assert
             var exception = Assert.Throws<ArgumentNullException>(Call);
@@ -155,14 +158,15 @@
             var mocks = new MockRepository();
             var calculateStrategy = mocks.Stub<IFailureMechanismSectionResultCalculateProbabilityStrategy>();
             var errorProvider = mocks.Stub<IInitialFailureMechanismResultErrorProvider>();
+            var lengthEffectProvider = mocks.Stub<ILengthEffectProvider>();
             var assessmentSection = mocks.Stub<IAssessmentSection>();
             mocks.ReplayAll();
 
             FailureMechanismSection section = FailureMechanismSectionTestFactory.CreateFailureMechanismSection();
             var result = new AdoptableWithProfileProbabilityFailureMechanismSectionResult(section);
 
             // Call
-            void Call() => new AdoptableWithProfileProbabilityFailureMechanismSectionResultRow(result, calculateStrategy, errorProvider, () => double.NaN, assessmentSection, null);
+            void Call() => new AdoptableWithProfileProbabilityFailureMechanismSectionResultRow(result, calculateStrategy, errorProvider, lengthEffectProvider, assessmentSection, null);
 
             // Assert
             var exception = Assert.Throws<ArgumentNullException>(Call);
@@ -182,6 +186,7 @@
             calculateStrategy.Stub(c => c.CalculateProfileProbability()).Return(profileProbability);
             calculateStrategy.Stub(c => c.CalculateSectionProbability()).Return(sectionProbability);
             var errorProvider = mocks.Stub<IInitialFailureMechanismResultErrorProvider>();
+            var lengthEffectProvider = mocks.Stub<ILengthEffectProvider>();
             mocks.ReplayAll();
 
             FailureMechanismSection section = FailureMechanismSectionTestFactory.CreateFailureMechanismSection();
@@ -193,7 +198,7 @@
             using (new AssemblyToolCalculatorFactoryConfig())
             {
                 // Call
-                var row = new AdoptableWithProfileProbabilityFailureMechanismSectionResultRow(result, calculateStrategy, errorProvider, () => double.NaN, new AssessmentSectionStub(), ConstructionProperties);
+                var row = new AdoptableWithProfileProbabilityFailureMechanismSectionResultRow(result, calculateStrategy, errorProvider, lengthEffectProvider, new AssessmentSectionStub(), ConstructionProperties);
 
                 // Assert
                 Assert.IsInstanceOf<FailureMechanismSectionResultRow<AdoptableWithProfileProbabilityFailureMechanismSectionResult>>(row);
@@ -254,14 +259,15 @@
             calculateStrategy.Stub(c => c.CalculateProfileProbability()).Return(profileProbability);
             calculateStrategy.Stub(c => c.CalculateSectionProbability()).Return(sectionProbability);
             var errorProvider = mocks.Stub<IInitialFailureMechanismResultErrorProvider>();
+            var lengthEffectProvider = mocks.Stub<ILengthEffectProvider>();
             mocks.ReplayAll();
 
             FailureMechanismSection section = FailureMechanismSectionTestFactory.CreateFailureMechanismSection();
             var result = new AdoptableWithProfileProbabilityFailureMechanismSectionResult(section);
 
             using (new AssemblyToolCalculatorFactoryConfig())
             {
-                var row = new AdoptableWithProfileProbabilityFailureMechanismSectionResultRow(result, calculateStrategy, errorProvider, () => double.NaN, new AssessmentSectionStub(), ConstructionProperties);
+                var row = new AdoptableWithProfileProbabilityFailureMechanismSectionResultRow(result, calculateStrategy, errorProvider, lengthEffectProvider, new AssessmentSectionStub(), ConstructionProperties);
 
                 // Precondition
                 Assert.AreEqual(profileProbability, row.InitialFailureMechanismResultProfileProbability);
@@ -287,6 +293,7 @@
             var mocks = new MockRepository();
             var calculateStrategy = mocks.Stub<IFailureMechanismSectionResultCalculateProbabilityStrategy>();
             var errorProvider = mocks.Stub<IInitialFailureMechanismResultErrorProvider>();
+            var lengthEffectProvider = mocks.Stub<ILengthEffectProvider>();
             mocks.ReplayAll();
 
             FailureMechanismSection section = FailureMechanismSectionTestFactory.CreateFailureMechanismSection();
@@ -297,7 +304,7 @@
 
             using (new AssemblyToolCalculatorFactoryConfig())
             {
-                var row = new AdoptableWithProfileProbabilityFailureMechanismSectionResultRow(result, calculateStrategy, errorProvider, () => double.NaN, new AssessmentSectionStub(), ConstructionProperties);
+                var row = new AdoptableWithProfileProbabilityFailureMechanismSectionResultRow(result, calculateStrategy, errorProvider, lengthEffectProvider, new AssessmentSectionStub(), ConstructionProperties);
 
                 // Precondition
                 Assert.AreEqual(result.RefinedProfileProbability, row.RefinedProfileProbability);
@@ -326,6 +333,7 @@
                          .IgnoreArguments()
                          .Return(errorText)
                          .Repeat.Twice();
+            var lengthEffectProvider = mocks.Stub<ILengthEffectProvider>();
             mocks.ReplayAll();
 
             FailureMechanismSection section = FailureMechanismSectionTestFactory.CreateFailureMechanismSection();
@@ -334,7 +342,7 @@
             using (new AssemblyToolCalculatorFactoryConfig())
             {
                 // When
-                var row = new AdoptableWithProfileProbabilityFailureMechanismSectionResultRow(result, calculateStrategy, errorProvider, () => double.NaN, new AssessmentSectionStub(), ConstructionProperties);
+                var row = new AdoptableWithProfileProbabilityFailureMechanismSectionResultRow(result, calculateStrategy, errorProvider, lengthEffectProvider, new AssessmentSectionStub(), ConstructionProperties);
 
                 // Then
                 IDictionary<int, DataGridViewColumnStateDefinition> columnStateDefinitions = row.ColumnStateDefinitions;
@@ -359,6 +367,7 @@
             errorProvider.Stub(ep => ep.GetProbabilityValidationError(null))
                          .IgnoreArguments()
                          .Return("error message");
+            var lengthEffectProvider = mocks.Stub<ILengthEffectProvider>();
             mocks.ReplayAll();
 
             FailureMechanismSection section = FailureMechanismSectionTestFactory.CreateFailureMechanismSection();
@@ -371,7 +380,7 @@
             using (new AssemblyToolCalculatorFactoryConfig())
             {
                 // When
-                var row = new AdoptableWithProfileProbabilityFailureMechanismSectionResultRow(result, calculateStrategy, errorProvider, () => double.NaN, new AssessmentSectionStub(), ConstructionProperties);
+                var row = new AdoptableWithProfileProbabilityFailureMechanismSectionResultRow(result, calculateStrategy, errorProvider, lengthEffectProvider, new AssessmentSectionStub(), ConstructionProperties);
 
                 // Then
                 IDictionary<int, DataGridViewColumnStateDefinition> columnStateDefinitions = row.ColumnStateDefinitions;
@@ -505,6 +514,7 @@
             var mocks = new MockRepository();
             var calculateStrategy = mocks.Stub<IFailureMechanismSectionResultCalculateProbabilityStrategy>();
             var errorProvider = mocks.Stub<IInitialFailureMechanismResultErrorProvider>();
+            var lengthEffectProvider = mocks.Stub<ILengthEffectProvider>();
             var observer = mocks.StrictMock<IObserver>();
             observer.Expect(o => o.UpdateObserver());
             mocks.ReplayAll();
@@ -515,7 +525,7 @@
 
             using (new AssemblyToolCalculatorFactoryConfig())
             {
-                var row = new AdoptableWithProfileProbabilityFailureMechanismSectionResultRow(result, calculateStrategy, errorProvider, () => double.NaN, new AssessmentSectionStub(), ConstructionProperties);
+                var row = new AdoptableWithProfileProbabilityFailureMechanismSectionResultRow(result, calculateStrategy, errorProvider, lengthEffectProvider, new AssessmentSectionStub(), ConstructionProperties);
 
                 // Call
                 setPropertyAction(row);
@@ -534,14 +544,15 @@
             var mocks = new MockRepository();
             var calculateStrategy = mocks.Stub<IFailureMechanismSectionResultCalculateProbabilityStrategy>();
             var errorProvider = mocks.Stub<IInitialFailureMechanismResultErrorProvider>();
+            var lengthEffectProvider = mocks.Stub<ILengthEffectProvider>();
             mocks.ReplayAll();
 
             FailureMechanismSection section = FailureMechanismSectionTestFactory.CreateFailureMechanismSection();
             var result = new AdoptableWithProfileProbabilityFailureMechanismSectionResult(section);
 
             using (new AssemblyToolCalculatorFactoryConfig())
             {
-                var row = new AdoptableWithProfileProbabilityFailureMechanismSectionResultRow(result, calculateStrategy, errorProvider, () => double.NaN, new AssessmentSectionStub(), ConstructionProperties);
+                var row = new AdoptableWithProfileProbabilityFailureMechanismSectionResultRow(result, calculateStrategy, errorProvider, lengthEffectProvider, new AssessmentSectionStub(), ConstructionProperties);
 
                 // Call
                 void Call() => setPropertyAction(row);
@@ -571,6 +582,8 @@
             calculateStrategy.Stub(c => c.CalculateProfileProbability()).Return(initialProfileProbability);
             calculateStrategy.Stub(c => c.CalculateSectionProbability()).Return(initialSectionProbability);
             var errorProvider = mocks.Stub<IInitialFailureMechanismResultErrorProvider>();
+            var lengthEffectProvider = mocks.Stub<ILengthEffectProvider>();
+            lengthEffectProvider.Stub(lep => lep.SectionN).Return(n);
             mocks.ReplayAll();
 
             var assessmentSection = new AssessmentSectionStub();
@@ -588,7 +601,7 @@
                 FailureMechanismSectionAssemblyCalculatorStub calculator = calculatorFactory.LastCreatedFailureMechanismSectionAssemblyCalculator;
 
                 // Call
-                var row = new AdoptableWithProfileProbabilityFailureMechanismSectionResultRow(result, calculateStrategy, errorProvider, () => n, assessmentSection, ConstructionProperties);
+                var row = new AdoptableWithProfileProbabilityFailureMechanismSectionResultRow(result, calculateStrategy, errorProvider, lengthEffectProvider, assessmentSection, ConstructionProperties);
 
                 // Assert
                 FailureMechanismSectionAssemblyInput input = calculator.FailureMechanismSectionAssemblyInput;
@@ -615,6 +628,7 @@
             var mocks = new MockRepository();
             var calculateStrategy = mocks.Stub<IFailureMechanismSectionResultCalculateProbabilityStrategy>();
             var errorProvider = mocks.Stub<IInitialFailureMechanismResultErrorProvider>();
+            var lengthEffectProvider = mocks.Stub<ILengthEffectProvider>();
             mocks.ReplayAll();
 
             FailureMechanismSection section = FailureMechanismSectionTestFactory.CreateFailureMechanismSection();
@@ -628,7 +642,7 @@
                     random.NextDouble(), random.NextDouble(), random.NextDouble(), random.NextEnumValue<FailureMechanismSectionAssemblyGroup>());
 
                 // Call
-                var row = new AdoptableWithProfileProbabilityFailureMechanismSectionResultRow(result, calculateStrategy, errorProvider, () => double.NaN, new AssessmentSectionStub(), ConstructionProperties);
+                var row = new AdoptableWithProfileProbabilityFailureMechanismSectionResultRow(result, calculateStrategy, errorProvider, lengthEffectProvider, new AssessmentSectionStub(), ConstructionProperties);
 
                 // Assert
                 FailureMechanismSectionAssemblyResult calculatorOutput = calculator.FailureMechanismSectionAssemblyResultOutput;
@@ -654,6 +668,7 @@
             var mocks = new MockRepository();
             var calculateStrategy = mocks.Stub<IFailureMechanismSectionResultCalculateProbabilityStrategy>();
             var errorProvider = mocks.Stub<IInitialFailureMechanismResultErrorProvider>();
+            var lengthEffectProvider = mocks.Stub<ILengthEffectProvider>();
             mocks.ReplayAll();
 
             FailureMechanismSection section = FailureMechanismSectionTestFactory.CreateFailureMechanismSection();
@@ -666,7 +681,7 @@
                 calculator.FailureMechanismSectionAssemblyResultOutput = new FailureMechanismSectionAssemblyResult(
                     random.NextDouble(), random.NextDouble(), random.NextDouble(), random.NextEnumValue<FailureMechanismSectionAssemblyGroup>());
 
-                var row = new AdoptableWithProfileProbabilityFailureMechanismSectionResultRow(result, calculateStrategy, errorProvider, () => double.NaN, new AssessmentSectionStub(), ConstructionProperties);
+                var row = new AdoptableWithProfileProbabilityFailureMechanismSectionResultRow(result, calculateStrategy, errorProvider, lengthEffectProvider, new AssessmentSectionStub(), ConstructionProperties);
 
                 // Precondition
                 FailureMechanismSectionAssemblyResult calculatorOutput = calculator.FailureMechanismSectionAssemblyResultOutput;
@@ -690,6 +705,7 @@
             var mocks = new MockRepository();
             var calculateStrategy = mocks.Stub<IFailureMechanismSectionResultCalculateProbabilityStrategy>();
             var errorProvider = mocks.Stub<IInitialFailureMechanismResultErrorProvider>();
+            var lengthEffectProvider = mocks.Stub<ILengthEffectProvider>();
             mocks.ReplayAll();
 
             FailureMechanismSection section = FailureMechanismSectionTestFactory.CreateFailureMechanismSection();
@@ -700,7 +716,7 @@
                 var calculatorFactory = (TestAssemblyToolCalculatorFactory) AssemblyToolCalculatorFactory.Instance;
                 FailureMechanismSectionAssemblyCalculatorStub calculator = calculatorFactory.LastCreatedFailureMechanismSectionAssemblyCalculator;
 
-                var row = new AdoptableWithProfileProbabilityFailureMechanismSectionResultRow(result, calculateStrategy, errorProvider, () => double.NaN, new AssessmentSectionStub(), ConstructionProperties);
+                var row = new AdoptableWithProfileProbabilityFailureMechanismSectionResultRow(result, calculateStrategy, errorProvider, lengthEffectProvider, new AssessmentSectionStub(), ConstructionProperties);
 
                 // Precondition
                 IDictionary<int, DataGridViewColumnStateDefinition> columnStateDefinitions = row.ColumnStateDefinitions;
@@ -732,6 +748,7 @@
             var mocks = new MockRepository();
             var calculateStrategy = mocks.Stub<IFailureMechanismSectionResultCalculateProbabilityStrategy>();
             var errorProvider = mocks.Stub<IInitialFailureMechanismResultErrorProvider>();
+            var lengthEffectProvider = mocks.Stub<ILengthEffectProvider>();
             mocks.ReplayAll();
 
             FailureMechanismSection section = FailureMechanismSectionTestFactory.CreateFailureMechanismSection();
@@ -743,7 +760,7 @@
                 FailureMechanismSectionAssemblyCalculatorStub calculator = calculatorFactory.LastCreatedFailureMechanismSectionAssemblyCalculator;
                 calculator.ThrowExceptionOnCalculate = true;
 
-                var row = new AdoptableWithProfileProbabilityFailureMechanismSectionResultRow(result, calculateStrategy, errorProvider, () => double.NaN, new AssessmentSectionStub(), ConstructionProperties);
+                var row = new AdoptableWithProfileProbabilityFailureMechanismSectionResultRow(result, calculateStrategy, errorProvider, lengthEffectProvider, new AssessmentSectionStub(), ConstructionProperties);
 
                 // Precondition
                 IDictionary<int, DataGridViewColumnStateDefinition> columnStateDefinitions = row.ColumnStateDefinitions;
@@ -788,6 +805,7 @@
             var mocks = new MockRepository();
             var calculateStrategy = mocks.Stub<IFailureMechanismSectionResultCalculateProbabilityStrategy>();
             var errorProvider = mocks.Stub<IInitialFailureMechanismResultErrorProvider>();
+            var lengthEffectProvider = mocks.Stub<ILengthEffectProvider>();
             mocks.ReplayAll();
 
             FailureMechanismSection section = FailureMechanismSectionTestFactory.CreateFailureMechanismSection();
@@ -796,7 +814,7 @@
             using (new AssemblyToolCalculatorFactoryConfig())
             {
                 // Call
-                var row = new AdoptableWithProfileProbabilityFailureMechanismSectionResultRow(result, calculateStrategy, errorProvider, () => double.NaN, new AssessmentSectionStub(), ConstructionProperties);
+                var row = new AdoptableWithProfileProbabilityFailureMechanismSectionResultRow(result, calculateStrategy, errorProvider, lengthEffectProvider, new AssessmentSectionStub(), ConstructionProperties);
 
                 // Assert
                 IDictionary<int, DataGridViewColumnStateDefinition> columnStateDefinitions = row.ColumnStateDefinitions;
@@ -821,6 +839,7 @@
             var mocks = new MockRepository();
             var calculateStrategy = mocks.Stub<IFailureMechanismSectionResultCalculateProbabilityStrategy>();
             var errorProvider = mocks.Stub<IInitialFailureMechanismResultErrorProvider>();
+            var lengthEffectProvider = mocks.Stub<ILengthEffectProvider>();
             mocks.ReplayAll();
 
             FailureMechanismSection section = FailureMechanismSectionTestFactory.CreateFailureMechanismSection();
@@ -835,7 +854,7 @@
             using (new AssemblyToolCalculatorFactoryConfig())
             {
                 // Call
-                var row = new AdoptableWithProfileProbabilityFailureMechanismSectionResultRow(result, calculateStrategy, errorProvider, () => double.NaN, new AssessmentSectionStub(), ConstructionProperties);
+                var row = new AdoptableWithProfileProbabilityFailureMechanismSectionResultRow(result, calculateStrategy, errorProvider, lengthEffectProvider, new AssessmentSectionStub(), ConstructionProperties);
 
                 // Assert
                 IDictionary<int, DataGridViewColumnStateDefinition> columnStateDefinitions = row.ColumnStateDefinitions;
@@ -873,6 +892,7 @@
             errorProvider.Stub(ep => ep.GetProbabilityValidationError(null))
                          .IgnoreArguments()
                          .Return(string.Empty);
+            var lengthEffectProvider = mocks.Stub<ILengthEffectProvider>();
             mocks.ReplayAll();
 
             FailureMechanismSection section = FailureMechanismSectionTestFactory.CreateFailureMechanismSection();
@@ -884,7 +904,7 @@
             using (new AssemblyToolCalculatorFactoryConfig())
             {
                 // Call
-                var row = new AdoptableWithProfileProbabilityFailureMechanismSectionResultRow(result, calculateStrategy, errorProvider, () => double.NaN, new AssessmentSectionStub(), ConstructionProperties);
+                var row = new AdoptableWithProfileProbabilityFailureMechanismSectionResultRow(result, calculateStrategy, errorProvider, lengthEffectProvider, new AssessmentSectionStub(), ConstructionProperties);
 
                 // Assert
                 IDictionary<int, DataGridViewColumnStateDefinition> columnStateDefinitions = row.ColumnStateDefinitions;
@@ -907,6 +927,7 @@
             var mocks = new MockRepository();
             var calculateStrategy = mocks.Stub<IFailureMechanismSectionResultCalculateProbabilityStrategy>();
             var errorProvider = mocks.Stub<IInitialFailureMechanismResultErrorProvider>();
+            var lengthEffectProvider = mocks.Stub<ILengthEffectProvider>();
             mocks.ReplayAll();
 
             FailureMechanismSection section = FailureMechanismSectionTestFactory.CreateFailureMechanismSection();
@@ -919,7 +940,7 @@
             using (new AssemblyToolCalculatorFactoryConfig())
             {
                 // Call
-                var row = new AdoptableWithProfileProbabilityFailureMechanismSectionResultRow(result, calculateStrategy, errorProvider, () => double.NaN, new AssessmentSectionStub(), ConstructionProperties);
+                var row = new AdoptableWithProfileProbabilityFailureMechanismSectionResultRow(result, calculateStrategy, errorProvider, lengthEffectProvider, new AssessmentSectionStub(), ConstructionProperties);
 
                 // Assert
                 IDictionary<int, DataGridViewColumnStateDefinition> columnStateDefinitions = row.ColumnStateDefinitions;
@@ -947,6 +968,7 @@
             var mocks = new MockRepository();
             var calculateStrategy = mocks.Stub<IFailureMechanismSectionResultCalculateProbabilityStrategy>();
             var errorProvider = mocks.Stub<IInitialFailureMechanismResultErrorProvider>();
+            var lengthEffectProvider = mocks.Stub<ILengthEffectProvider>();
             mocks.ReplayAll();
 
             FailureMechanismSection section = FailureMechanismSectionTestFactory.CreateFailureMechanismSection();
@@ -959,7 +981,7 @@
             using (new AssemblyToolCalculatorFactoryConfig())
             {
                 // Call
-                var row = new AdoptableWithProfileProbabilityFailureMechanismSectionResultRow(result, calculateStrategy, errorProvider, () => double.NaN, new AssessmentSectionStub(), ConstructionProperties);
+                var row = new AdoptableWithProfileProbabilityFailureMechanismSectionResultRow(result, calculateStrategy, errorProvider, lengthEffectProvider, new AssessmentSectionStub(), ConstructionProperties);
 
                 // Assert
                 IDictionary<int, DataGridViewColumnStateDefinition> columnStateDefinitions = row.ColumnStateDefinitions;
@@ -982,6 +1004,7 @@
             var mocks = new MockRepository();
             var calculateStrategy = mocks.Stub<IFailureMechanismSectionResultCalculateProbabilityStrategy>();
             var errorProvider = mocks.Stub<IInitialFailureMechanismResultErrorProvider>();
+            var lengthEffectProvider = mocks.Stub<ILengthEffectProvider>();
             mocks.ReplayAll();
 
             FailureMechanismSection section = FailureMechanismSectionTestFactory.CreateFailureMechanismSection();
@@ -994,7 +1017,7 @@
                 calculator.FailureMechanismSectionAssemblyResultOutput = new FailureMechanismSectionAssemblyResult(double.NaN, double.NaN, double.NaN, assemblyGroup);
 
                 // Call
-                var row = new AdoptableWithProfileProbabilityFailureMechanismSectionResultRow(result, calculateStrategy, errorProvider, () => double.NaN, new AssessmentSectionStub(), ConstructionProperties);
+                var row = new AdoptableWithProfileProbabilityFailureMechanismSectionResultRow(result, calculateStrategy, errorProvider, lengthEffectProvider, new AssessmentSectionStub(), ConstructionProperties);
 
                 // Assert
                 IDictionary<int, DataGridViewColumnStateDefinition> columnStateDefinitions = row.ColumnStateDefinitions;
Index: Riskeer/GrassCoverErosionInwards/src/Riskeer.GrassCoverErosionInwards.Forms/Views/GrassCoverErosionInwardsFailureMechanismResultView.cs
===================================================================
diff -u -r712e462c20fd4a4b41cdc7df9731b6b50789909d -rb2a84d4ad12dde705c07722ef9c264b268bec879
--- Riskeer/GrassCoverErosionInwards/src/Riskeer.GrassCoverErosionInwards.Forms/Views/GrassCoverErosionInwardsFailureMechanismResultView.cs	(.../GrassCoverErosionInwardsFailureMechanismResultView.cs)	(revision 712e462c20fd4a4b41cdc7df9731b6b50789909d)
+++ Riskeer/GrassCoverErosionInwards/src/Riskeer.GrassCoverErosionInwards.Forms/Views/GrassCoverErosionInwardsFailureMechanismResultView.cs	(.../GrassCoverErosionInwardsFailureMechanismResultView.cs)	(revision b2a84d4ad12dde705c07722ef9c264b268bec879)
@@ -104,7 +104,7 @@
                 sectionResult,
                 CreateCalculateStrategy(sectionResult, calculationScenarios),
                 CreateErrorProvider(sectionResult, calculationScenarios),
-                () => FailureMechanism.GeneralInput.N,
+                CreateLengthEffectProvider(),
                 assessmentSection,
                 new AdoptableWithProfileProbabilityFailureMechanismSectionResultRow.ConstructionProperties
                 {
@@ -205,5 +205,12 @@
                 sectionResult, calculationScenarios,
                 (scenario, lineSegments) => scenario.IsDikeProfileIntersectionWithReferenceLineInSection(lineSegments));
         }
+
+        private ILengthEffectProvider CreateLengthEffectProvider()
+        {
+            return new LengthEffectProvider(
+                () => FailureMechanism.GeneralInput.ApplyLengthEffectInSection,
+                () => FailureMechanism.GeneralInput.N);
+        }
     }
 }
\ No newline at end of file
Index: Riskeer/MacroStabilityInwards/src/Riskeer.MacroStabilityInwards.Forms/Views/MacroStabilityInwardsFailureMechanismResultView.cs
===================================================================
diff -u -r712e462c20fd4a4b41cdc7df9731b6b50789909d -rb2a84d4ad12dde705c07722ef9c264b268bec879
--- Riskeer/MacroStabilityInwards/src/Riskeer.MacroStabilityInwards.Forms/Views/MacroStabilityInwardsFailureMechanismResultView.cs	(.../MacroStabilityInwardsFailureMechanismResultView.cs)	(revision 712e462c20fd4a4b41cdc7df9731b6b50789909d)
+++ Riskeer/MacroStabilityInwards/src/Riskeer.MacroStabilityInwards.Forms/Views/MacroStabilityInwardsFailureMechanismResultView.cs	(.../MacroStabilityInwardsFailureMechanismResultView.cs)	(revision b2a84d4ad12dde705c07722ef9c264b268bec879)
@@ -103,7 +103,7 @@
                 sectionResult,
                 CreateCalculateStrategy(sectionResult, calculationScenarios),
                 CreateErrorProvider(sectionResult, calculationScenarios),
-                () => FailureMechanism.MacroStabilityInwardsProbabilityAssessmentInput.GetN(sectionResult.Section.Length),
+                CreateLengthEffectProvider(sectionResult),
                 assessmentSection,
                 new AdoptableWithProfileProbabilityFailureMechanismSectionResultRow.ConstructionProperties
                 {
@@ -203,5 +203,12 @@
             return new InitialFailureMechanismResultErrorProvider<MacroStabilityInwardsCalculationScenario>(
                 sectionResult, calculationScenarios, (scenario, lineSegments) => scenario.IsSurfaceLineIntersectionWithReferenceLineInSection(lineSegments));
         }
+
+        private ILengthEffectProvider CreateLengthEffectProvider(IFailureMechanismSectionResult sectionResult)
+        {
+            return new LengthEffectProvider(
+                () => FailureMechanism.GeneralInput.ApplyLengthEffectInSection,
+                () => FailureMechanism.MacroStabilityInwardsProbabilityAssessmentInput.GetN(sectionResult.Section.Length));
+        }
     }
 }
\ No newline at end of file
Index: Riskeer/Piping/src/Riskeer.Piping.Forms/Views/PipingFailureMechanismResultView.cs
===================================================================
diff -u -r712e462c20fd4a4b41cdc7df9731b6b50789909d -rb2a84d4ad12dde705c07722ef9c264b268bec879
--- Riskeer/Piping/src/Riskeer.Piping.Forms/Views/PipingFailureMechanismResultView.cs	(.../PipingFailureMechanismResultView.cs)	(revision 712e462c20fd4a4b41cdc7df9731b6b50789909d)
+++ Riskeer/Piping/src/Riskeer.Piping.Forms/Views/PipingFailureMechanismResultView.cs	(.../PipingFailureMechanismResultView.cs)	(revision b2a84d4ad12dde705c07722ef9c264b268bec879)
@@ -126,7 +126,7 @@
                 sectionResult,
                 CreateCalculateStrategy(sectionResult, scenarioConfigurationForSection),
                 CreateErrorProvider(sectionResult, scenarioConfigurationForSection),
-                () => FailureMechanism.PipingProbabilityAssessmentInput.GetN(sectionResult.Section.Length),
+                CreateLengthEffectProvider(sectionResult),
                 assessmentSection,
                 new AdoptableWithProfileProbabilityFailureMechanismSectionResultRow.ConstructionProperties
                 {
@@ -245,5 +245,12 @@
                    || FailureMechanism.ScenarioConfigurationType == PipingScenarioConfigurationType.PerFailureMechanismSection
                    && scenarioConfigurationForSection.ScenarioConfigurationType == PipingScenarioConfigurationPerFailureMechanismSectionType.SemiProbabilistic;
         }
+
+        private ILengthEffectProvider CreateLengthEffectProvider(IFailureMechanismSectionResult sectionResult)
+        {
+            return new LengthEffectProvider(
+                () => FailureMechanism.GeneralInput.ApplyLengthEffectInSection,
+                () => FailureMechanism.PipingProbabilityAssessmentInput.GetN(sectionResult.Section.Length));
+        }
     }
 }
\ No newline at end of file