Index: Ringtoets/DuneErosion/src/Ringtoets.DuneErosion.Data/DuneErosionFailureMechanismExtensions.cs
===================================================================
diff -u -r861341a7835c17ca6309ff1b6e0b8fe2269b5c0f -r32061d48745c5325becd9adac3118d976587b3b6
--- Ringtoets/DuneErosion/src/Ringtoets.DuneErosion.Data/DuneErosionFailureMechanismExtensions.cs	(.../DuneErosionFailureMechanismExtensions.cs)	(revision 861341a7835c17ca6309ff1b6e0b8fe2269b5c0f)
+++ Ringtoets/DuneErosion/src/Ringtoets.DuneErosion.Data/DuneErosionFailureMechanismExtensions.cs	(.../DuneErosionFailureMechanismExtensions.cs)	(revision 32061d48745c5325becd9adac3118d976587b3b6)
@@ -23,7 +23,9 @@
 using System.Collections.Generic;
 using System.Linq;
 using Core.Common.Base.Geometry;
+using Ringtoets.Common.Data.AssessmentSection;
 using Ringtoets.Common.Data.Hydraulics;
+using Ringtoets.DuneErosion.Data.Properties;
 
 namespace Ringtoets.DuneErosion.Data
 {
@@ -64,5 +66,35 @@
                 }
             }
         }
+
+        /// <summary>
+        /// Gets the norm which is needed in the calculations within <see cref="DuneErosionFailureMechanism"/>.
+        /// </summary>
+        /// <param name="failureMechanism">The <see cref="DuneErosionFailureMechanism"/> to get the failure mechanism norm for.</param>
+        /// <param name="assessmentSection">The <see cref="IAssessmentSection"/> which contains the assessment section norm.</param>
+        /// <returns>The value of the failure mechanism norm.</returns>
+        /// <exception cref="ArgumentNullException">Thrown when any parameter is <c>null</c>.</exception>
+        /// <exception cref="ArgumentException">Thrown when <paramref name="failureMechanism"/> has no (0) contribution.</exception>
+        public static double GetMechanismSpecificNorm(this DuneErosionFailureMechanism failureMechanism,
+                                                      IAssessmentSection assessmentSection)
+        {
+            if (failureMechanism == null)
+            {
+                throw new ArgumentNullException("failureMechanism");
+            }
+            if (assessmentSection == null)
+            {
+                throw new ArgumentNullException("assessmentSection");
+            }
+
+            if (Math.Abs(failureMechanism.Contribution) < 1e-6)
+            {
+                throw new ArgumentException(Resources.DuneErosionFailureMechanismExtensions_GetMechanismSpecificNorm_Contribution_is_zero);
+            }
+
+            return 2.15*(failureMechanism.Contribution/100)
+                   *assessmentSection.FailureMechanismContribution.Norm
+                   /failureMechanism.GeneralInput.N;
+        }
     }
 }
\ No newline at end of file
Index: Ringtoets/DuneErosion/src/Ringtoets.DuneErosion.Data/Properties/Resources.Designer.cs
===================================================================
diff -u -r9ea9915bf83c70b481d4c58af0ae7e5866218766 -r32061d48745c5325becd9adac3118d976587b3b6
--- Ringtoets/DuneErosion/src/Ringtoets.DuneErosion.Data/Properties/Resources.Designer.cs	(.../Resources.Designer.cs)	(revision 9ea9915bf83c70b481d4c58af0ae7e5866218766)
+++ Ringtoets/DuneErosion/src/Ringtoets.DuneErosion.Data/Properties/Resources.Designer.cs	(.../Resources.Designer.cs)	(revision 32061d48745c5325becd9adac3118d976587b3b6)
@@ -98,5 +98,15 @@
                 return ResourceManager.GetString("DuneErosionFailureMechanism_DisplayName", resourceCulture);
             }
         }
+        
+        /// <summary>
+        ///   Looks up a localized string similar to De bijdrage van dit toetsspoor is nul. Daardoor kunnen de berekeningen niet worden uitgevoerd..
+        /// </summary>
+        public static string DuneErosionFailureMechanismExtensions_GetMechanismSpecificNorm_Contribution_is_zero {
+            get {
+                return ResourceManager.GetString("DuneErosionFailureMechanismExtensions_GetMechanismSpecificNorm_Contribution_is_ze" +
+                        "ro", resourceCulture);
+            }
+        }
     }
 }
Index: Ringtoets/DuneErosion/src/Ringtoets.DuneErosion.Data/Properties/Resources.resx
===================================================================
diff -u -ra4cd22ab000aa81906e43b5fd2898e52fee0e366 -r32061d48745c5325becd9adac3118d976587b3b6
--- Ringtoets/DuneErosion/src/Ringtoets.DuneErosion.Data/Properties/Resources.resx	(.../Resources.resx)	(revision a4cd22ab000aa81906e43b5fd2898e52fee0e366)
+++ Ringtoets/DuneErosion/src/Ringtoets.DuneErosion.Data/Properties/Resources.resx	(.../Resources.resx)	(revision 32061d48745c5325becd9adac3118d976587b3b6)
@@ -123,4 +123,7 @@
   <data name="DuneErosionFailureMechanism_DisplayName" xml:space="preserve">
     <value>Duinwaterkering - Duinafslag</value>
   </data>
+  <data name="DuneErosionFailureMechanismExtensions_GetMechanismSpecificNorm_Contribution_is_zero" xml:space="preserve">
+    <value>De bijdrage van dit toetsspoor is nul. Daardoor kunnen de berekeningen niet worden uitgevoerd.</value>
+  </data>
 </root>
\ No newline at end of file
Index: Ringtoets/DuneErosion/src/Ringtoets.DuneErosion.Data/Ringtoets.DuneErosion.Data.csproj
===================================================================
diff -u -rff3476b4646da757e0ec892b069b31336cbd520e -r32061d48745c5325becd9adac3118d976587b3b6
--- Ringtoets/DuneErosion/src/Ringtoets.DuneErosion.Data/Ringtoets.DuneErosion.Data.csproj	(.../Ringtoets.DuneErosion.Data.csproj)	(revision ff3476b4646da757e0ec892b069b31336cbd520e)
+++ Ringtoets/DuneErosion/src/Ringtoets.DuneErosion.Data/Ringtoets.DuneErosion.Data.csproj	(.../Ringtoets.DuneErosion.Data.csproj)	(revision 32061d48745c5325becd9adac3118d976587b3b6)
@@ -72,6 +72,7 @@
     <EmbeddedResource Include="Properties\Resources.resx">
       <Generator>PublicResXFileCodeGenerator</Generator>
       <LastGenOutput>Resources.Designer.cs</LastGenOutput>
+      <SubType>Designer</SubType>
     </EmbeddedResource>
   </ItemGroup>
   <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
Index: Ringtoets/DuneErosion/test/Ringtoets.DuneErosion.Data.Test/DuneErosionFailureMechanismExtensionsTest.cs
===================================================================
diff -u -r861341a7835c17ca6309ff1b6e0b8fe2269b5c0f -r32061d48745c5325becd9adac3118d976587b3b6
--- Ringtoets/DuneErosion/test/Ringtoets.DuneErosion.Data.Test/DuneErosionFailureMechanismExtensionsTest.cs	(.../DuneErosionFailureMechanismExtensionsTest.cs)	(revision 861341a7835c17ca6309ff1b6e0b8fe2269b5c0f)
+++ Ringtoets/DuneErosion/test/Ringtoets.DuneErosion.Data.Test/DuneErosionFailureMechanismExtensionsTest.cs	(.../DuneErosionFailureMechanismExtensionsTest.cs)	(revision 32061d48745c5325becd9adac3118d976587b3b6)
@@ -21,7 +21,11 @@
 
 using System;
 using System.Linq;
+using Core.Common.TestUtil;
 using NUnit.Framework;
+using Rhino.Mocks;
+using Ringtoets.Common.Data.AssessmentSection;
+using Ringtoets.Common.Data.Contribution;
 using Ringtoets.Common.Data.Hydraulics;
 using Ringtoets.DuneErosion.Data.TestUtil;
 
@@ -105,5 +109,97 @@
             // Assert
             CollectionAssert.IsEmpty(failureMechanism.DuneLocations);
         }
+
+        [Test]
+        public void GetMechanismSpecificNorm_FailureMechanismNull_ThrowArgumentNullException()
+        {
+            // Setup
+            var mocks = new MockRepository();
+            var assessmentSection = mocks.Stub<IAssessmentSection>();
+            mocks.ReplayAll();
+
+            // Call
+            TestDelegate test = () => DuneErosionFailureMechanismExtensions.GetMechanismSpecificNorm(null, assessmentSection);
+
+            // Assert
+            var exception = Assert.Throws<ArgumentNullException>(test);
+            Assert.AreEqual("failureMechanism", exception.ParamName);
+            mocks.VerifyAll();
+        }
+
+        [Test]
+        public void GetMechanismSpecificNorm_AssessmentSectionNull_ThrowArgumentNullException()
+        {
+            // Setup
+            var failureMechanism = new DuneErosionFailureMechanism();
+
+            // Call
+            TestDelegate test = () => failureMechanism.GetMechanismSpecificNorm(null);
+
+            // Assert
+            var exception = Assert.Throws<ArgumentNullException>(test);
+            Assert.AreEqual("assessmentSection", exception.ParamName);
+        }
+
+        [Test]
+        public void GetMechanismSpecificNorm_WithZeroContributionForFailureMechanism_ThrowsArgumentException()
+        {
+            // Setup
+            var failureMechanism = new DuneErosionFailureMechanism
+            {
+                Contribution = 0
+            };
+
+            var mocks = new MockRepository();
+            var assessmentSection = mocks.StrictMock<IAssessmentSection>();
+            assessmentSection.Stub(a => a.GetFailureMechanisms()).Return(new[]
+            {
+                failureMechanism
+            });
+            assessmentSection.Stub(a => a.FailureMechanismContribution).Return(new FailureMechanismContribution(new[]
+            {
+                failureMechanism
+            }, 1, 1.0 / 300));
+            mocks.ReplayAll();
+
+            // Call
+            TestDelegate action = () => failureMechanism.GetMechanismSpecificNorm(assessmentSection);
+
+            // Assert
+            const string expectedMessage = "De bijdrage van dit toetsspoor is nul. Daardoor kunnen de berekeningen niet worden uitgevoerd.";
+            TestHelper.AssertThrowsArgumentExceptionAndTestMessage<ArgumentException>(action, expectedMessage);
+            mocks.VerifyAll();
+        }
+
+        [Test]
+        public void GetMechanismSpecificNorm_WithValidData_ReturnMechanismSpecificNorm()
+        {
+            // Setup
+            const double norm = 1.0 / 200;
+            const double contribution = 10;
+            var failureMechanism = new DuneErosionFailureMechanism
+            {
+                Contribution = contribution
+            };
+
+            var mocks = new MockRepository();
+            var assessmentSection = mocks.StrictMock<IAssessmentSection>();
+            assessmentSection.Stub(a => a.GetFailureMechanisms()).Return(new[]
+            {
+                failureMechanism
+            });
+            assessmentSection.Stub(a => a.FailureMechanismContribution).Return(new FailureMechanismContribution(new[]
+            {
+                failureMechanism
+            }, 1, norm));
+            mocks.ReplayAll();
+
+            // Call
+            double mechanismSpecificNorm = failureMechanism.GetMechanismSpecificNorm(assessmentSection);
+
+            // Assert
+            Assert.AreEqual(0.0005375, mechanismSpecificNorm);
+            mocks.VerifyAll();
+        }
     }
 }
\ No newline at end of file
Index: Ringtoets/DuneErosion/test/Ringtoets.DuneErosion.Data.Test/Ringtoets.DuneErosion.Data.Test.csproj
===================================================================
diff -u -rff3476b4646da757e0ec892b069b31336cbd520e -r32061d48745c5325becd9adac3118d976587b3b6
--- Ringtoets/DuneErosion/test/Ringtoets.DuneErosion.Data.Test/Ringtoets.DuneErosion.Data.Test.csproj	(.../Ringtoets.DuneErosion.Data.Test.csproj)	(revision ff3476b4646da757e0ec892b069b31336cbd520e)
+++ Ringtoets/DuneErosion/test/Ringtoets.DuneErosion.Data.Test/Ringtoets.DuneErosion.Data.Test.csproj	(.../Ringtoets.DuneErosion.Data.Test.csproj)	(revision 32061d48745c5325becd9adac3118d976587b3b6)
@@ -42,6 +42,10 @@
       <HintPath>..\..\..\..\packages\NUnit.2.6.4\lib\nunit.framework.dll</HintPath>
       <Private>True</Private>
     </Reference>
+    <Reference Include="Rhino.Mocks, Version=3.6.0.0, Culture=neutral, PublicKeyToken=0b3305902db7183f, processorArchitecture=MSIL">
+      <HintPath>..\..\..\..\packages\RhinoMocks.3.6.1\lib\net\Rhino.Mocks.dll</HintPath>
+      <Private>True</Private>
+    </Reference>
     <Reference Include="System" />
     <Reference Include="System.Core" />
   </ItemGroup>
@@ -67,6 +71,10 @@
       <Project>{3BBFD65B-B277-4E50-AE6D-BD24C3434609}</Project>
       <Name>Core.Common.Base</Name>
     </ProjectReference>
+    <ProjectReference Include="..\..\..\..\Core\Common\test\Core.Common.TestUtil\Core.Common.TestUtil.csproj">
+      <Project>{D749EE4C-CE50-4C17-BF01-9A953028C126}</Project>
+      <Name>Core.Common.TestUtil</Name>
+    </ProjectReference>
     <ProjectReference Include="..\..\..\Common\src\Ringtoets.Common.Data\Ringtoets.Common.Data.csproj">
       <Project>{D4200F43-3F72-4F42-AF0A-8CED416A38EC}</Project>
       <Name>Ringtoets.Common.Data</Name>
Index: Ringtoets/DuneErosion/test/Ringtoets.DuneErosion.Data.Test/packages.config
===================================================================
diff -u -ra4cd22ab000aa81906e43b5fd2898e52fee0e366 -r32061d48745c5325becd9adac3118d976587b3b6
--- Ringtoets/DuneErosion/test/Ringtoets.DuneErosion.Data.Test/packages.config	(.../packages.config)	(revision a4cd22ab000aa81906e43b5fd2898e52fee0e366)
+++ Ringtoets/DuneErosion/test/Ringtoets.DuneErosion.Data.Test/packages.config	(.../packages.config)	(revision 32061d48745c5325becd9adac3118d976587b3b6)
@@ -1,4 +1,5 @@
-<?xml version="1.0" encoding="utf-8"?><!--
+<?xml version="1.0" encoding="utf-8"?>
+<!--
 Copyright (C) Stichting Deltares 2016. All rights reserved.
 
 This file is part of Ringtoets.
@@ -20,7 +21,7 @@
 Stichting Deltares and remain full property of Stichting Deltares at all times.
 All rights reserved.
 -->
-
 <packages>
   <package id="NUnit" version="2.6.4" targetFramework="net40" />
+  <package id="RhinoMocks" version="3.6.1" targetFramework="net40" />
 </packages>
\ No newline at end of file
Index: Ringtoets/GrassCoverErosionOutwards/src/Ringtoets.GrassCoverErosionOutwards.Data/GrassCoverErosionOutwardsFailureMechanismExtensions.cs
===================================================================
diff -u -re182f6f394aa75e739467a77e7bcacd9a8b25429 -r32061d48745c5325becd9adac3118d976587b3b6
--- Ringtoets/GrassCoverErosionOutwards/src/Ringtoets.GrassCoverErosionOutwards.Data/GrassCoverErosionOutwardsFailureMechanismExtensions.cs	(.../GrassCoverErosionOutwardsFailureMechanismExtensions.cs)	(revision e182f6f394aa75e739467a77e7bcacd9a8b25429)
+++ Ringtoets/GrassCoverErosionOutwards/src/Ringtoets.GrassCoverErosionOutwards.Data/GrassCoverErosionOutwardsFailureMechanismExtensions.cs	(.../GrassCoverErosionOutwardsFailureMechanismExtensions.cs)	(revision 32061d48745c5325becd9adac3118d976587b3b6)
@@ -59,7 +59,7 @@
         /// Gets the norm which is needed in the calculations within <see cref="GrassCoverErosionOutwardsFailureMechanism"/>.
         /// </summary>
         /// <param name="failureMechanism">The <see cref="GrassCoverErosionOutwardsFailureMechanism"/> to get the failure mechanism norm for.</param>
-        /// <param name="assessmentSection">The <see cref="IAssessmentSection"/> which contains the assessment section norm</param>
+        /// <param name="assessmentSection">The <see cref="IAssessmentSection"/> which contains the assessment section norm.</param>
         /// <returns>The value of the failure mechanism norm.</returns>
         /// <exception cref="ArgumentNullException">Thrown when <paramref name="assessmentSection"/> is <c>null</c>.</exception>
         /// <exception cref="ArgumentException">Thrown when <paramref name="failureMechanism"/> has no (0) contribution.</exception>
Index: Ringtoets/GrassCoverErosionOutwards/test/Ringtoets.GrassCoverErosionOutwards.Data.Test/GrassCoverErosionOutwardsFailureMechanismExtensionsTest.cs
===================================================================
diff -u -re182f6f394aa75e739467a77e7bcacd9a8b25429 -r32061d48745c5325becd9adac3118d976587b3b6
--- Ringtoets/GrassCoverErosionOutwards/test/Ringtoets.GrassCoverErosionOutwards.Data.Test/GrassCoverErosionOutwardsFailureMechanismExtensionsTest.cs	(.../GrassCoverErosionOutwardsFailureMechanismExtensionsTest.cs)	(revision e182f6f394aa75e739467a77e7bcacd9a8b25429)
+++ Ringtoets/GrassCoverErosionOutwards/test/Ringtoets.GrassCoverErosionOutwards.Data.Test/GrassCoverErosionOutwardsFailureMechanismExtensionsTest.cs	(.../GrassCoverErosionOutwardsFailureMechanismExtensionsTest.cs)	(revision 32061d48745c5325becd9adac3118d976587b3b6)
@@ -128,6 +128,7 @@
 
             // Assert
             Assert.AreEqual(0.00025, mechanismSpecificNorm);
+            mocks.VerifyAll();
         }
 
         [Test]
@@ -156,6 +157,7 @@
 
             // Assert
             TestHelper.AssertThrowsArgumentExceptionAndTestMessage<ArgumentException>(action, "De bijdrage van dit toetsspoor is nul. Daardoor is de doorsnede-eis onbepaald en kunnen de berekeningen niet worden uitgevoerd.");
+            mocks.VerifyAll();
         }
     }
 }
\ No newline at end of file