Index: Ringtoets/GrassCoverErosionOutwards/src/Ringtoets.GrassCoverErosionOutwards.Forms/Views/GrassCoverErosionOutwardsFailureMechanismResultView.cs
===================================================================
diff -u -r7b6db7cc459f1427bb6e239591c9df86b6f573e0 -rce2380f19bfb4ee9e63613a57656418466ba4abf
--- Ringtoets/GrassCoverErosionOutwards/src/Ringtoets.GrassCoverErosionOutwards.Forms/Views/GrassCoverErosionOutwardsFailureMechanismResultView.cs	(.../GrassCoverErosionOutwardsFailureMechanismResultView.cs)	(revision 7b6db7cc459f1427bb6e239591c9df86b6f573e0)
+++ Ringtoets/GrassCoverErosionOutwards/src/Ringtoets.GrassCoverErosionOutwards.Forms/Views/GrassCoverErosionOutwardsFailureMechanismResultView.cs	(.../GrassCoverErosionOutwardsFailureMechanismResultView.cs)	(revision ce2380f19bfb4ee9e63613a57656418466ba4abf)
@@ -19,16 +19,10 @@
 // Stichting Deltares and remain full property of Stichting Deltares at all times.
 // All rights reserved.
 
-using System;
-using System.Linq;
 using Core.Common.Base;
-using Core.Common.Util;
-using Ringtoets.Common.Data.FailureMechanism;
 using Ringtoets.Common.Forms.Builders;
 using Ringtoets.Common.Forms.Views;
-using Ringtoets.Common.Primitives;
 using Ringtoets.GrassCoverErosionOutwards.Data;
-using RingtoetsCommonFormsResources = Ringtoets.Common.Forms.Properties.Resources;
 
 namespace Ringtoets.GrassCoverErosionOutwards.Forms.Views
 {
@@ -58,7 +52,7 @@
                 DataGridViewControl,
                 nameof(GrassCoverErosionOutwardsFailureMechanismSectionResultRow.Name));
 
-            FailureMechanismSectionResultViewColumnBuilder.AddSimpleAssessmentValidityOnlyResultColumn(
+            FailureMechanismSectionResultViewColumnBuilder.AddSimpleAssessmentResultColumn(
                 DataGridViewControl,
                 nameof(GrassCoverErosionOutwardsFailureMechanismSectionResultRow.SimpleAssessmentResult));
 
@@ -101,6 +95,14 @@
             FailureMechanismSectionResultViewColumnBuilder.AddCombinedAssemblyCategoryGroupColumn(
                 DataGridViewControl,
                 nameof(GrassCoverErosionOutwardsFailureMechanismSectionResultRow.CombinedAssemblyCategoryGroup));
+
+            FailureMechanismSectionResultViewColumnBuilder.AddUseManualAssemblyCategoryGroupColumn(
+                DataGridViewControl,
+                nameof(GrassCoverErosionOutwardsFailureMechanismSectionResultRow.UseManualAssemblyCategoryGroup));
+
+            FailureMechanismSectionResultViewColumnBuilder.AddManualAssemblyCategoryGroupColumn(
+                DataGridViewControl,
+                nameof(GrassCoverErosionOutwardsFailureMechanismSectionResultRow.ManualAssemblyCategoryGroup));
         }
     }
 }
\ No newline at end of file
Index: Ringtoets/GrassCoverErosionOutwards/test/Ringtoets.GrassCoverErosionOutwards.Forms.Test/Views/GrassCoverErosionOutwardsFailureMechanismResultViewTest.cs
===================================================================
diff -u -r7b6db7cc459f1427bb6e239591c9df86b6f573e0 -rce2380f19bfb4ee9e63613a57656418466ba4abf
--- Ringtoets/GrassCoverErosionOutwards/test/Ringtoets.GrassCoverErosionOutwards.Forms.Test/Views/GrassCoverErosionOutwardsFailureMechanismResultViewTest.cs	(.../GrassCoverErosionOutwardsFailureMechanismResultViewTest.cs)	(revision 7b6db7cc459f1427bb6e239591c9df86b6f573e0)
+++ Ringtoets/GrassCoverErosionOutwards/test/Ringtoets.GrassCoverErosionOutwards.Forms.Test/Views/GrassCoverErosionOutwardsFailureMechanismResultViewTest.cs	(.../GrassCoverErosionOutwardsFailureMechanismResultViewTest.cs)	(revision ce2380f19bfb4ee9e63613a57656418466ba4abf)
@@ -47,7 +47,9 @@
         private const int detailedAssemblyCategoryGroupIndex = 9;
         private const int tailorMadeAssemblyCategoryGroupIndex = 10;
         private const int combinedAssemblyCategoryGroupIndex = 11;
-        private const int columnCount = 12;
+        private const int useManualAssemblyCategoryGroupIndex = 12;
+        private const int manualAssemblyCategoryGroupIndex = 13;
+        private const int columnCount = 14;
 
         [Test]
         public void Constructor_ExpectedValues()
@@ -98,6 +100,8 @@
                 Assert.IsInstanceOf<DataGridViewTextBoxColumn>(dataGridView.Columns[detailedAssemblyCategoryGroupIndex]);
                 Assert.IsInstanceOf<DataGridViewTextBoxColumn>(dataGridView.Columns[tailorMadeAssemblyCategoryGroupIndex]);
                 Assert.IsInstanceOf<DataGridViewTextBoxColumn>(dataGridView.Columns[combinedAssemblyCategoryGroupIndex]);
+                Assert.IsInstanceOf<DataGridViewCheckBoxColumn>(dataGridView.Columns[useManualAssemblyCategoryGroupIndex]);
+                Assert.IsInstanceOf<DataGridViewComboBoxColumn>(dataGridView.Columns[manualAssemblyCategoryGroupIndex]);
 
                 Assert.AreEqual("Eenvoudige toets", dataGridView.Columns[simpleAssessmentResultIndex].HeaderText);
                 Assert.AreEqual("Gedetailleerde toets\r\nper vak\r\nCat. Iv - IIv", dataGridView.Columns[detailedAssessmentResultForFactorizedSignalingNormIndex].HeaderText);
@@ -110,6 +114,8 @@
                 Assert.AreEqual("Assemblageresultaat\r\ngedetailleerde toets per vak", dataGridView.Columns[detailedAssemblyCategoryGroupIndex].HeaderText);
                 Assert.AreEqual("Assemblageresultaat\r\ntoets op maat", dataGridView.Columns[tailorMadeAssemblyCategoryGroupIndex].HeaderText);
                 Assert.AreEqual("Assemblageresultaat\r\ngecombineerd", dataGridView.Columns[combinedAssemblyCategoryGroupIndex].HeaderText);
+                Assert.AreEqual("Overschrijf\r\nassemblageresultaat", dataGridView.Columns[useManualAssemblyCategoryGroupIndex].HeaderText);
+                Assert.AreEqual("Assemblageresultaat\r\nhandmatig", dataGridView.Columns[manualAssemblyCategoryGroupIndex].HeaderText);
 
                 Assert.AreEqual(DataGridViewAutoSizeColumnsMode.AllCells, dataGridView.AutoSizeColumnsMode);
                 Assert.AreEqual(DataGridViewContentAlignment.MiddleCenter, dataGridView.ColumnHeadersDefaultCellStyle.Alignment);
@@ -150,6 +156,8 @@
                 Assert.AreEqual("IIv", cells[detailedAssemblyCategoryGroupIndex].Value);
                 Assert.AreEqual("Iv", cells[tailorMadeAssemblyCategoryGroupIndex].Value);
                 Assert.AreEqual("Iv", cells[combinedAssemblyCategoryGroupIndex].Value);
+                Assert.AreEqual(false, cells[useManualAssemblyCategoryGroupIndex].Value);
+                Assert.AreEqual(SelectableFailureMechanismSectionAssemblyCategoryGroup.None, cells[manualAssemblyCategoryGroupIndex].Value);
             }
         }
     }