Index: Ringtoets/StabilityStoneCover/src/Ringtoets.StabilityStoneCover.Forms/PropertyClasses/StabilityStoneCoverFailureMechanismProperties.cs
===================================================================
diff -u -r4ca0389a47c2979f47d826f86a84e2e9f7a6f7f6 -rdea52353c1070458ac644d22bd81e517b4ac5bbe
--- Ringtoets/StabilityStoneCover/src/Ringtoets.StabilityStoneCover.Forms/PropertyClasses/StabilityStoneCoverFailureMechanismProperties.cs	(.../StabilityStoneCoverFailureMechanismProperties.cs)	(revision 4ca0389a47c2979f47d826f86a84e2e9f7a6f7f6)
+++ Ringtoets/StabilityStoneCover/src/Ringtoets.StabilityStoneCover.Forms/PropertyClasses/StabilityStoneCoverFailureMechanismProperties.cs	(.../StabilityStoneCoverFailureMechanismProperties.cs)	(revision dea52353c1070458ac644d22bd81e517b4ac5bbe)
@@ -55,7 +55,7 @@
         #region Length effect parameters
 
         [DynamicVisible]
-        [PropertyOrder(6)]
+        [PropertyOrder(7)]
         [ResourcesCategory(typeof(RingtoetsCommonFormsResources), nameof(RingtoetsCommonFormsResources.Categories_LengthEffect))]
         [ResourcesDisplayName(typeof(RingtoetsCommonFormsResources), nameof(RingtoetsCommonFormsResources.FailureMechanism_N_DisplayName))]
         [ResourcesDescription(typeof(RingtoetsCommonFormsResources), nameof(RingtoetsCommonFormsResources.FailureMechanism_N_Description))]
@@ -86,7 +86,8 @@
 
         private bool ShouldHidePropertyWhenFailureMechanismIrrelevant(string propertyName)
         {
-            return nameof(Blocks).Equals(propertyName)
+            return nameof(Contribution).Equals(propertyName)
+                   || nameof(Blocks).Equals(propertyName)
                    || nameof(Columns).Equals(propertyName)
                    || nameof(N).Equals(propertyName);
         }
@@ -117,8 +118,21 @@
             }
         }
 
+        [DynamicVisible]
         [PropertyOrder(3)]
         [ResourcesCategory(typeof(RingtoetsCommonFormsResources), nameof(RingtoetsCommonFormsResources.Categories_General))]
+        [ResourcesDisplayName(typeof(RingtoetsCommonFormsResources), nameof(RingtoetsCommonFormsResources.FailureMechanism_Contribution_DisplayName))]
+        [ResourcesDescription(typeof(RingtoetsCommonFormsResources), nameof(RingtoetsCommonFormsResources.FailureMechanism_Contribution_Description))]
+        public double Contribution
+        {
+            get
+            {
+                return data.Contribution;
+            }
+        }
+
+        [PropertyOrder(4)]
+        [ResourcesCategory(typeof(RingtoetsCommonFormsResources), nameof(RingtoetsCommonFormsResources.Categories_General))]
         [ResourcesDisplayName(typeof(RingtoetsCommonFormsResources), nameof(RingtoetsCommonFormsResources.FailureMechanism_IsRelevant_DisplayName))]
         [ResourcesDescription(typeof(RingtoetsCommonFormsResources), nameof(RingtoetsCommonFormsResources.FailureMechanism_IsRelevant_Description))]
         public bool IsRelevant
@@ -134,7 +148,7 @@
         #region Model settings
 
         [DynamicVisible]
-        [PropertyOrder(4)]
+        [PropertyOrder(5)]
         [TypeConverter(typeof(ExpandableObjectConverter))]
         [ResourcesCategory(typeof(RingtoetsCommonFormsResources), nameof(RingtoetsCommonFormsResources.Categories_ModelSettings))]
         [ResourcesDisplayName(typeof(Resources), nameof(Resources.StabilityStoneCoverWaveConditions_Blocks_DisplayName))]
@@ -151,7 +165,7 @@
         }
 
         [DynamicVisible]
-        [PropertyOrder(5)]
+        [PropertyOrder(6)]
         [TypeConverter(typeof(ExpandableObjectConverter))]
         [ResourcesCategory(typeof(RingtoetsCommonFormsResources), nameof(RingtoetsCommonFormsResources.Categories_ModelSettings))]
         [ResourcesDisplayName(typeof(Resources), nameof(Resources.StabilityStoneCoverWaveConditions_Columns_DisplayName))]
Index: Ringtoets/StabilityStoneCover/test/Ringtoets.StabilityStoneCover.Forms.Test/PropertyClasses/StabilityStoneCoverFailureMechanismPropertiesTest.cs
===================================================================
diff -u -r4ca0389a47c2979f47d826f86a84e2e9f7a6f7f6 -rdea52353c1070458ac644d22bd81e517b4ac5bbe
--- Ringtoets/StabilityStoneCover/test/Ringtoets.StabilityStoneCover.Forms.Test/PropertyClasses/StabilityStoneCoverFailureMechanismPropertiesTest.cs	(.../StabilityStoneCoverFailureMechanismPropertiesTest.cs)	(revision 4ca0389a47c2979f47d826f86a84e2e9f7a6f7f6)
+++ Ringtoets/StabilityStoneCover/test/Ringtoets.StabilityStoneCover.Forms.Test/PropertyClasses/StabilityStoneCoverFailureMechanismPropertiesTest.cs	(.../StabilityStoneCoverFailureMechanismPropertiesTest.cs)	(revision dea52353c1070458ac644d22bd81e517b4ac5bbe)
@@ -73,10 +73,13 @@
             Assert.AreSame(failureMechanism, properties.Data);
             Assert.AreEqual(failureMechanism.Name, properties.Name);
             Assert.AreEqual(failureMechanism.Code, properties.Code);
+            Assert.AreEqual(failureMechanism.Contribution, properties.Contribution);
             Assert.AreEqual(isRelevant, properties.IsRelevant);
-            Assert.AreSame(failureMechanism.GeneralInput.GeneralBlocksWaveConditionsInput, properties.Blocks.Data);
-            Assert.AreSame(failureMechanism.GeneralInput.GeneralColumnsWaveConditionsInput, properties.Columns.Data);
-            Assert.AreEqual(failureMechanism.GeneralInput.N, properties.N);
+
+            GeneralStabilityStoneCoverWaveConditionsInput generalInput = failureMechanism.GeneralInput;
+            Assert.AreSame(generalInput.GeneralBlocksWaveConditionsInput, properties.Blocks.Data);
+            Assert.AreSame(generalInput.GeneralColumnsWaveConditionsInput, properties.Columns.Data);
+            Assert.AreEqual(generalInput.N, properties.N);
         }
 
         [Test]
@@ -109,7 +112,7 @@
 
             // Assert
             PropertyDescriptorCollection dynamicProperties = PropertiesTestHelper.GetAllVisiblePropertyDescriptors(properties);
-            Assert.AreEqual(6, dynamicProperties.Count);
+            Assert.AreEqual(7, dynamicProperties.Count);
 
             const string generalCategory = "Algemeen";
             const string modelSettingsCateogry = "Modelinstellingen";
@@ -129,28 +132,35 @@
                                                                             "Het label van het toetsspoor.",
                                                                             true);
 
-            PropertyDescriptor isRelevantProperty = dynamicProperties[2];
+            PropertyDescriptor contributionProperty = dynamicProperties[2];
+            PropertiesTestHelper.AssertRequiredPropertyDescriptorProperties(contributionProperty,
+                                                                            generalCategory,
+                                                                            "Faalkansbijdrage [%]",
+                                                                            "Procentuele bijdrage van dit toetsspoor aan de totale overstromingskans van het traject.",
+                                                                            true);
+
+            PropertyDescriptor isRelevantProperty = dynamicProperties[3];
             PropertiesTestHelper.AssertRequiredPropertyDescriptorProperties(isRelevantProperty,
                                                                             generalCategory,
                                                                             "Is relevant",
                                                                             "Geeft aan of dit toetsspoor relevant is of niet.",
                                                                             true);
 
-            PropertyDescriptor blocksProperty = dynamicProperties[3];
+            PropertyDescriptor blocksProperty = dynamicProperties[4];
             PropertiesTestHelper.AssertRequiredPropertyDescriptorProperties(blocksProperty,
                                                                             modelSettingsCateogry,
                                                                             "Blokken",
                                                                             "De modelinstellingen voor het berekenen van golfcondities voor blokken.",
                                                                             true);
 
-            PropertyDescriptor columnsProperty = dynamicProperties[4];
+            PropertyDescriptor columnsProperty = dynamicProperties[5];
             PropertiesTestHelper.AssertRequiredPropertyDescriptorProperties(columnsProperty,
                                                                             modelSettingsCateogry,
                                                                             "Zuilen",
                                                                             "De modelinstellingen voor het berekenen van golfcondities voor zuilen.",
                                                                             true);
 
-            PropertyDescriptor nProperty = dynamicProperties[5];
+            PropertyDescriptor nProperty = dynamicProperties[6];
             PropertiesTestHelper.AssertRequiredPropertyDescriptorProperties(nProperty,
                                                                             lengthEffectCategory,
                                                                             "N [-]",
@@ -214,6 +224,7 @@
             Assert.IsTrue(properties.DynamicVisibleValidationMethod(nameof(properties.Code)));
             Assert.IsTrue(properties.DynamicVisibleValidationMethod(nameof(properties.IsRelevant)));
 
+            Assert.AreEqual(isRelevant, properties.DynamicVisibleValidationMethod(nameof(properties.Contribution)));
             Assert.AreEqual(isRelevant, properties.DynamicVisibleValidationMethod(nameof(properties.Blocks)));
             Assert.AreEqual(isRelevant, properties.DynamicVisibleValidationMethod(nameof(properties.Columns)));
             Assert.AreEqual(isRelevant, properties.DynamicVisibleValidationMethod(nameof(properties.N)));