Index: Riskeer/Common/src/Riskeer.Common.Forms/Helpers/FailureMechanismSectionAssemblyGroupHelper.cs
===================================================================
diff -u
--- Riskeer/Common/src/Riskeer.Common.Forms/Helpers/FailureMechanismSectionAssemblyGroupHelper.cs	(revision 0)
+++ Riskeer/Common/src/Riskeer.Common.Forms/Helpers/FailureMechanismSectionAssemblyGroupHelper.cs	(revision c8cd24c1b88b32c7dbf4ff380ed56c7ef1b65fcc)
@@ -0,0 +1,59 @@
+// Copyright (C) Stichting Deltares 2021. All rights reserved.
+//
+// This file is part of Riskeer.
+//
+// Riskeer is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+// 
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program. If not, see <http://www.gnu.org/licenses/>.
+//
+// All names, logos, and references to "Deltares" are registered trademarks of
+// Stichting Deltares and remain full property of Stichting Deltares at all times.
+// All rights reserved.
+
+using System;
+using System.ComponentModel;
+using Core.Common.Util;
+using Riskeer.AssemblyTool.Data;
+using Riskeer.AssemblyTool.Forms;
+
+namespace Riskeer.Common.Forms.Helpers
+{
+    /// <summary>
+    /// Helper class for displaying <see cref="FailureMechanismSectionAssemblyGroup"/>.
+    /// </summary>
+    public static class FailureMechanismSectionAssemblyGroupHelper
+    {
+        /// <summary>
+        /// Gets the display name of the given <paramref name="assemblyGroup"/>.
+        /// </summary>
+        /// <param name="assemblyGroup">The assembly group to get the display name for.</param>
+        /// <returns>The display name.</returns>
+        /// <exception cref="InvalidEnumArgumentException">Thrown when <see cref="FailureMechanismSectionAssemblyGroup"/>
+        /// is an invalid value.</exception>
+        /// <exception cref="NotSupportedException">Thrown when <see cref="FailureMechanismSectionAssemblyGroup"/>
+        /// is a valid value, but unsupported.</exception>
+        public static string GetAssemblyGroupDisplayName(FailureMechanismSectionAssemblyGroup assemblyGroup)
+        {
+            if (!Enum.IsDefined(typeof(FailureMechanismSectionAssemblyGroup), assemblyGroup))
+            {
+                throw new InvalidEnumArgumentException(nameof(assemblyGroup),
+                                                       (int) assemblyGroup,
+                                                       typeof(FailureMechanismSectionAssemblyGroup));
+            }
+
+            DisplayFailureMechanismSectionAssemblyGroup displayAssemblyGroup = DisplayFailureMechanismSectionAssemblyGroupConverter.Convert(
+                assemblyGroup);
+
+            return new EnumDisplayWrapper<DisplayFailureMechanismSectionAssemblyGroup>(displayAssemblyGroup).DisplayName;
+        }
+    }
+}
\ No newline at end of file
Index: Riskeer/Common/test/Riskeer.Common.Forms.Test/Helpers/FailureMechanismSectionAssemblyGroupHelperTest.cs
===================================================================
diff -u
--- Riskeer/Common/test/Riskeer.Common.Forms.Test/Helpers/FailureMechanismSectionAssemblyGroupHelperTest.cs	(revision 0)
+++ Riskeer/Common/test/Riskeer.Common.Forms.Test/Helpers/FailureMechanismSectionAssemblyGroupHelperTest.cs	(revision c8cd24c1b88b32c7dbf4ff380ed56c7ef1b65fcc)
@@ -0,0 +1,66 @@
+// Copyright (C) Stichting Deltares 2021. All rights reserved.
+//
+// This file is part of Riskeer.
+//
+// Riskeer is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+// 
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program. If not, see <http://www.gnu.org/licenses/>.
+//
+// All names, logos, and references to "Deltares" are registered trademarks of
+// Stichting Deltares and remain full property of Stichting Deltares at all times.
+// All rights reserved.
+
+using System.ComponentModel;
+using Core.Common.TestUtil;
+using NUnit.Framework;
+using Riskeer.AssemblyTool.Data;
+using Riskeer.Common.Forms.Helpers;
+
+namespace Riskeer.Common.Forms.Test.Helpers
+{
+    [TestFixture]
+    public class FailureMechanismSectionAssemblyGroupHelperTest
+    {
+        [Test]
+        public void GetAssemblyGroupDisplayName_InvalidValue_ThrowsInvalidEnumArgumentException()
+        {
+            // Call
+            void Call() => FailureMechanismSectionAssemblyGroupHelper.GetAssemblyGroupDisplayName((FailureMechanismSectionAssemblyGroup) 99);
+
+            // Assert
+            var expectedMessage = $"The value of argument 'assemblyGroup' (99) is invalid for Enum type '{nameof(FailureMechanismSectionAssemblyGroup)}'.";
+            TestHelper.AssertThrowsArgumentExceptionAndTestMessage<InvalidEnumArgumentException>(Call, expectedMessage);
+        }
+
+        [Test]
+        [TestCase(FailureMechanismSectionAssemblyGroup.ND, "ND")]
+        [TestCase(FailureMechanismSectionAssemblyGroup.III, "+III")]
+        [TestCase(FailureMechanismSectionAssemblyGroup.II, "+II")]
+        [TestCase(FailureMechanismSectionAssemblyGroup.I, "+I")]
+        [TestCase(FailureMechanismSectionAssemblyGroup.ZeroPlus, "+0")]
+        [TestCase(FailureMechanismSectionAssemblyGroup.Zero, "0")]
+        [TestCase(FailureMechanismSectionAssemblyGroup.IMin, "-I")]
+        [TestCase(FailureMechanismSectionAssemblyGroup.IIMin, "-II")]
+        [TestCase(FailureMechanismSectionAssemblyGroup.IIIMin, "-III")]
+        [TestCase(FailureMechanismSectionAssemblyGroup.D, "D")]
+        [TestCase(FailureMechanismSectionAssemblyGroup.Gr, "")]
+        public void GetAssemblyGroupDisplayName_ValidValue_ReturnsDisplayName(FailureMechanismSectionAssemblyGroup categoryGroup,
+                                                                              string expectedDisplayName)
+        {
+            // Call
+            string displayName = FailureMechanismSectionAssemblyGroupHelper.GetAssemblyGroupDisplayName(categoryGroup);
+
+            // Assert
+            Assert.AreEqual(expectedDisplayName, displayName);
+        }
+    }
+}
\ No newline at end of file