Index: Riskeer/GrassCoverErosionInwards/test/Riskeer.GrassCoverErosionInwards.Data.Test/GrassCoverErosionInwardsCalculationScenarioExtensionsTest.cs
===================================================================
diff -u -r99389b8c7fc27efb7483fb16e5b5659e07d1a5d6 -r5c393bc8750c1cea8cc6e28e024f331aeea2ae52
--- Riskeer/GrassCoverErosionInwards/test/Riskeer.GrassCoverErosionInwards.Data.Test/GrassCoverErosionInwardsCalculationScenarioExtensionsTest.cs	(.../GrassCoverErosionInwardsCalculationScenarioExtensionsTest.cs)	(revision 99389b8c7fc27efb7483fb16e5b5659e07d1a5d6)
+++ Riskeer/GrassCoverErosionInwards/test/Riskeer.GrassCoverErosionInwards.Data.Test/GrassCoverErosionInwardsCalculationScenarioExtensionsTest.cs	(.../GrassCoverErosionInwardsCalculationScenarioExtensionsTest.cs)	(revision 5c393bc8750c1cea8cc6e28e024f331aeea2ae52)
@@ -48,7 +48,7 @@
         public void IsDikeProfileIntersectionWithReferenceLineInSection_LineSegmentsNull_ThrowsArgumentNullException()
         {
             // Setup
-            var calculation = new GrassCoverErosionInwardsCalculationScenario(double.NaN);
+            var calculation = new GrassCoverErosionInwardsCalculationScenario(0.1);
 
             // Call
             void Call() => calculation.IsDikeProfileIntersectionWithReferenceLineInSection(null);
@@ -62,7 +62,7 @@
         public void IsDikeProfileIntersectionWithReferenceLineInSection_CalculationWithoutDikeProfile_ReturnsFalse()
         {
             // Setup
-            var calculation = new GrassCoverErosionInwardsCalculationScenario(double.NaN);
+            var calculation = new GrassCoverErosionInwardsCalculationScenario(0.1);
 
             // Call
             bool intersects = calculation.IsDikeProfileIntersectionWithReferenceLineInSection(Enumerable.Empty<Segment2D>());
@@ -83,7 +83,7 @@
                 new Point2D(10.0, 0.0)
             });
 
-            var calculation = new GrassCoverErosionInwardsCalculationScenario(double.NaN)
+            var calculation = new GrassCoverErosionInwardsCalculationScenario(0.1)
             {
                 InputParameters =
                 {
@@ -110,7 +110,7 @@
                 new Point2D(10.0, 0.0)
             });
 
-            var calculation = new GrassCoverErosionInwardsCalculationScenario(double.NaN)
+            var calculation = new GrassCoverErosionInwardsCalculationScenario(0.1)
             {
                 InputParameters =
                 {
@@ -139,7 +139,7 @@
                 new Point2D(20.0, 0.0)
             });
 
-            var calculation = new GrassCoverErosionInwardsCalculationScenario(double.NaN)
+            var calculation = new GrassCoverErosionInwardsCalculationScenario(0.1)
             {
                 InputParameters =
                 {
Index: Riskeer/GrassCoverErosionInwards/test/Riskeer.GrassCoverErosionInwards.Data.Test/GrassCoverErosionInwardsCalculationScenarioTest.cs
===================================================================
diff -u -r4cb44d36bec6a6f1b4c1c2ff2db086b9996a2b42 -r5c393bc8750c1cea8cc6e28e024f331aeea2ae52
--- Riskeer/GrassCoverErosionInwards/test/Riskeer.GrassCoverErosionInwards.Data.Test/GrassCoverErosionInwardsCalculationScenarioTest.cs	(.../GrassCoverErosionInwardsCalculationScenarioTest.cs)	(revision 4cb44d36bec6a6f1b4c1c2ff2db086b9996a2b42)
+++ Riskeer/GrassCoverErosionInwards/test/Riskeer.GrassCoverErosionInwards.Data.Test/GrassCoverErosionInwardsCalculationScenarioTest.cs	(.../GrassCoverErosionInwardsCalculationScenarioTest.cs)	(revision 5c393bc8750c1cea8cc6e28e024f331aeea2ae52)
@@ -37,7 +37,7 @@
         public void Constructor_ExpectedValues()
         {
             // Call
-            var scenario = new GrassCoverErosionInwardsCalculationScenario(double.NaN);
+            var scenario = new GrassCoverErosionInwardsCalculationScenario(0.1);
 
             // Assert
             Assert.IsInstanceOf<GrassCoverErosionInwardsCalculation>(scenario);
@@ -53,7 +53,7 @@
         public void Contribution_SetInvalidValue_ThrowArgumentException(double newValue)
         {
             // Setup
-            var calculationScenario = new GrassCoverErosionInwardsCalculationScenario(double.NaN);
+            var calculationScenario = new GrassCoverErosionInwardsCalculationScenario(0.1);
 
             // Call
             void Call() => calculationScenario.Contribution = (RoundedDouble) newValue;
@@ -68,7 +68,7 @@
         public void Contribution_SetValidValue_ValueSet(double newValue)
         {
             // Setup
-            var calculationScenario = new GrassCoverErosionInwardsCalculationScenario(double.NaN);
+            var calculationScenario = new GrassCoverErosionInwardsCalculationScenario(0.1);
 
             // Call
             calculationScenario.Contribution = (RoundedDouble) newValue;
@@ -109,7 +109,7 @@
         {
             var random = new Random(21);
 
-            var calculation = new GrassCoverErosionInwardsCalculationScenario(double.NaN)
+            var calculation = new GrassCoverErosionInwardsCalculationScenario(0.1)
             {
                 Name = "A Name",
                 Comments =
Index: Riskeer/GrassCoverErosionInwards/test/Riskeer.GrassCoverErosionInwards.Data.Test/GrassCoverErosionInwardsCalculationTest.cs
===================================================================
diff -u -r4cb44d36bec6a6f1b4c1c2ff2db086b9996a2b42 -r5c393bc8750c1cea8cc6e28e024f331aeea2ae52
--- Riskeer/GrassCoverErosionInwards/test/Riskeer.GrassCoverErosionInwards.Data.Test/GrassCoverErosionInwardsCalculationTest.cs	(.../GrassCoverErosionInwardsCalculationTest.cs)	(revision 4cb44d36bec6a6f1b4c1c2ff2db086b9996a2b42)
+++ Riskeer/GrassCoverErosionInwards/test/Riskeer.GrassCoverErosionInwards.Data.Test/GrassCoverErosionInwardsCalculationTest.cs	(.../GrassCoverErosionInwardsCalculationTest.cs)	(revision 5c393bc8750c1cea8cc6e28e024f331aeea2ae52)
@@ -23,6 +23,7 @@
 using System.Collections.Generic;
 using Core.Common.Base;
 using Core.Common.Data.TestUtil;
+using Core.Common.TestUtil;
 using NUnit.Framework;
 using Riskeer.Common.Data.Calculation;
 using Riskeer.Common.Data.TestUtil.IllustrationPoints;
@@ -37,7 +38,7 @@
         public void Constructor_ExpectedValues()
         {
             // Setup
-            double norm = new Random(21).NextDouble();
+            double norm = new Random(21).NextDouble(1e-15, 0.1);
             
             // Call
             var calculation = new GrassCoverErosionInwardsCalculation(norm);
@@ -62,7 +63,7 @@
         public void Properties_Name_ReturnsExpectedValues(string name)
         {
             // Setup
-            var calculation = new GrassCoverErosionInwardsCalculation(double.NaN);
+            var calculation = new GrassCoverErosionInwardsCalculation(0.1);
 
             // Call
             calculation.Name = name;
@@ -78,7 +79,7 @@
         public void Property_Comments_ReturnsExpectedValues(string comments)
         {
             // Setup
-            var calculation = new GrassCoverErosionInwardsCalculation(double.NaN);
+            var calculation = new GrassCoverErosionInwardsCalculation(0.1);
 
             // Call
             calculation.Comments.Body = comments;
@@ -91,7 +92,7 @@
         public void ClearOutput_Always_SetsOutputToNull()
         {
             // Setup
-            var calculation = new GrassCoverErosionInwardsCalculation(double.NaN)
+            var calculation = new GrassCoverErosionInwardsCalculation(0.1)
             {
                 Output = new TestGrassCoverErosionInwardsOutput()
             };
@@ -107,7 +108,7 @@
         public void HasOutput_OutputNull_ReturnsFalse()
         {
             // Setup
-            var calculation = new GrassCoverErosionInwardsCalculation(double.NaN)
+            var calculation = new GrassCoverErosionInwardsCalculation(0.1)
             {
                 Output = null
             };
@@ -123,7 +124,7 @@
         public void HasOutput_OutputSet_ReturnsTrue()
         {
             // Setup
-            var calculation = new GrassCoverErosionInwardsCalculation(double.NaN)
+            var calculation = new GrassCoverErosionInwardsCalculation(0.1)
             {
                 Output = new TestGrassCoverErosionInwardsOutput()
             };
@@ -183,7 +184,7 @@
                                                                     new TestDikeHeightOutput(new TestGeneralResultFaultTreeIllustrationPoint()),
                                                                     new TestOvertoppingRateOutput(new TestGeneralResultFaultTreeIllustrationPoint()));
 
-            var calculation = new GrassCoverErosionInwardsCalculation(double.NaN)
+            var calculation = new GrassCoverErosionInwardsCalculation(0.1)
             {
                 Output = originalOutput
             };
@@ -202,7 +203,7 @@
         public void ClearIllustrationPoints_CalculationWithoutOutput_DoesNotThrow()
         {
             // Setup
-            var calculation = new GrassCoverErosionInwardsCalculation(double.NaN);
+            var calculation = new GrassCoverErosionInwardsCalculation(0.1);
 
             // Call
             void Call() => calculation.ClearIllustrationPoints();
@@ -213,7 +214,7 @@
 
         private static GrassCoverErosionInwardsCalculation CreateRandomCalculationWithoutOutput()
         {
-            var calculation = new GrassCoverErosionInwardsCalculation(double.NaN)
+            var calculation = new GrassCoverErosionInwardsCalculation(0.1)
             {
                 Comments =
                 {
@@ -241,7 +242,7 @@
             var overtoppingRateOutputWithoutGeneralResult = new TestOvertoppingRateOutput(1.0);
             var overtoppingRateOutputWithGeneralResult = new TestOvertoppingRateOutput(new TestGeneralResultFaultTreeIllustrationPoint());
 
-            yield return new TestCaseData(new GrassCoverErosionInwardsCalculation(double.NaN)
+            yield return new TestCaseData(new GrassCoverErosionInwardsCalculation(0.1)
                 {
                     InputParameters =
                     {
@@ -257,7 +258,7 @@
                 }, false)
                 .SetName("OutputSufficientScenario1");
 
-            yield return new TestCaseData(new GrassCoverErosionInwardsCalculation(double.NaN)
+            yield return new TestCaseData(new GrassCoverErosionInwardsCalculation(0.1)
                 {
                     InputParameters =
                     {
@@ -270,18 +271,18 @@
                 }, false)
                 .SetName("OutputSufficientScenario2");
 
-            yield return new TestCaseData(new GrassCoverErosionInwardsCalculation(double.NaN)
+            yield return new TestCaseData(new GrassCoverErosionInwardsCalculation(0.1)
                 {
                     Output = new GrassCoverErosionInwardsOutput(overtoppingOutputWithoutGeneralResult,
                                                                 null,
                                                                 null)
                 }, false)
                 .SetName("OutputSufficientScenario3");
 
-            yield return new TestCaseData(new GrassCoverErosionInwardsCalculation(double.NaN), true)
+            yield return new TestCaseData(new GrassCoverErosionInwardsCalculation(0.1), true)
                 .SetName("NoOutputScenario1");
 
-            yield return new TestCaseData(new GrassCoverErosionInwardsCalculation(double.NaN)
+            yield return new TestCaseData(new GrassCoverErosionInwardsCalculation(0.1)
                 {
                     InputParameters =
                     {
@@ -291,7 +292,7 @@
                 }, true)
                 .SetName("NoOutputScenario2");
 
-            yield return new TestCaseData(new GrassCoverErosionInwardsCalculation(double.NaN)
+            yield return new TestCaseData(new GrassCoverErosionInwardsCalculation(0.1)
                 {
                     InputParameters =
                     {
@@ -304,15 +305,15 @@
                 }, true)
                 .SetName("NoOutputScenario3");
 
-            yield return new TestCaseData(new GrassCoverErosionInwardsCalculation(double.NaN)
+            yield return new TestCaseData(new GrassCoverErosionInwardsCalculation(0.1)
                 {
                     Output = new GrassCoverErosionInwardsOutput(overtoppingOutputWithGeneralResult,
                                                                 null,
                                                                 null)
                 }, true)
                 .SetName("OvertoppingOutputWithRedundantGeneralResult");
 
-            yield return new TestCaseData(new GrassCoverErosionInwardsCalculation(double.NaN)
+            yield return new TestCaseData(new GrassCoverErosionInwardsCalculation(0.1)
                 {
                     InputParameters =
                     {
@@ -324,7 +325,7 @@
                 }, true)
                 .SetName("OvertoppingOutputWithMissingGeneralResult");
 
-            yield return new TestCaseData(new GrassCoverErosionInwardsCalculation(double.NaN)
+            yield return new TestCaseData(new GrassCoverErosionInwardsCalculation(0.1)
                 {
                     InputParameters =
                     {
@@ -336,7 +337,7 @@
                 }, true)
                 .SetName("DikeHeightOutputWithRedundantGeneralResult");
 
-            yield return new TestCaseData(new GrassCoverErosionInwardsCalculation(double.NaN)
+            yield return new TestCaseData(new GrassCoverErosionInwardsCalculation(0.1)
                 {
                     InputParameters =
                     {
@@ -349,7 +350,7 @@
                 }, true)
                 .SetName("DikeHeightOutputWithMissingGeneralResult");
 
-            yield return new TestCaseData(new GrassCoverErosionInwardsCalculation(double.NaN)
+            yield return new TestCaseData(new GrassCoverErosionInwardsCalculation(0.1)
                 {
                     InputParameters =
                     {
@@ -361,7 +362,7 @@
                 }, true)
                 .SetName("OvertoppingRateOutputWithRedundantGeneralResult");
 
-            yield return new TestCaseData(new GrassCoverErosionInwardsCalculation(double.NaN)
+            yield return new TestCaseData(new GrassCoverErosionInwardsCalculation(0.1)
                 {
                     InputParameters =
                     {
Index: Riskeer/GrassCoverErosionInwards/test/Riskeer.GrassCoverErosionInwards.Data.Test/GrassCoverErosionInwardsFailureMechanismTest.cs
===================================================================
diff -u -r99389b8c7fc27efb7483fb16e5b5659e07d1a5d6 -r5c393bc8750c1cea8cc6e28e024f331aeea2ae52
--- Riskeer/GrassCoverErosionInwards/test/Riskeer.GrassCoverErosionInwards.Data.Test/GrassCoverErosionInwardsFailureMechanismTest.cs	(.../GrassCoverErosionInwardsFailureMechanismTest.cs)	(revision 99389b8c7fc27efb7483fb16e5b5659e07d1a5d6)
+++ Riskeer/GrassCoverErosionInwards/test/Riskeer.GrassCoverErosionInwards.Data.Test/GrassCoverErosionInwardsFailureMechanismTest.cs	(.../GrassCoverErosionInwardsFailureMechanismTest.cs)	(revision 5c393bc8750c1cea8cc6e28e024f331aeea2ae52)
@@ -117,9 +117,9 @@
                     Children =
                     {
                         new CalculationGroup(),
-                        new GrassCoverErosionInwardsCalculation(double.NaN),
+                        new GrassCoverErosionInwardsCalculation(0.1),
                         mocks.StrictMock<ICalculation>(),
-                        new GrassCoverErosionInwardsCalculation(double.NaN)
+                        new GrassCoverErosionInwardsCalculation(0.1)
                     }
                 }
             };
Index: Riskeer/GrassCoverErosionInwards/test/Riskeer.GrassCoverErosionInwards.Data.TestUtil/GrassCoverErosionInwardsCalculationScenarioTestFactory.cs
===================================================================
diff -u -rff1fb057078592d0e808d7a6d8dd065a1478cf8b -r5c393bc8750c1cea8cc6e28e024f331aeea2ae52
--- Riskeer/GrassCoverErosionInwards/test/Riskeer.GrassCoverErosionInwards.Data.TestUtil/GrassCoverErosionInwardsCalculationScenarioTestFactory.cs	(.../GrassCoverErosionInwardsCalculationScenarioTestFactory.cs)	(revision ff1fb057078592d0e808d7a6d8dd065a1478cf8b)
+++ Riskeer/GrassCoverErosionInwards/test/Riskeer.GrassCoverErosionInwards.Data.TestUtil/GrassCoverErosionInwardsCalculationScenarioTestFactory.cs	(.../GrassCoverErosionInwardsCalculationScenarioTestFactory.cs)	(revision 5c393bc8750c1cea8cc6e28e024f331aeea2ae52)
@@ -59,7 +59,7 @@
                 throw new ArgumentNullException(nameof(section));
             }
 
-            var scenario = new GrassCoverErosionInwardsCalculationScenario(0.0)
+            var scenario = new GrassCoverErosionInwardsCalculationScenario(0.1)
             {
                 IsRelevant = true,
                 InputParameters =