Index: Riskeer/AssemblyTool/src/Riskeer.AssemblyTool.IO/Model/Enums/AssemblyXmlEnumIdentifiers.cs
===================================================================
diff -u -rfa3389c99cd0c94dfad0be6cb9c8a6a43df45e35 -re895524af739651c3e160a75f7c1fa6f361dcae4
--- Riskeer/AssemblyTool/src/Riskeer.AssemblyTool.IO/Model/Enums/AssemblyXmlEnumIdentifiers.cs	(.../AssemblyXmlEnumIdentifiers.cs)	(revision fa3389c99cd0c94dfad0be6cb9c8a6a43df45e35)
+++ Riskeer/AssemblyTool/src/Riskeer.AssemblyTool.IO/Model/Enums/AssemblyXmlEnumIdentifiers.cs	(.../AssemblyXmlEnumIdentifiers.cs)	(revision e895524af739651c3e160a75f7c1fa6f361dcae4)
@@ -290,11 +290,6 @@
         public const string SerializableFailureMechanismTypeSTBI = "STBI";
 
         /// <summary>
-        /// Identifier for <see cref="SerializableFailureMechanismType.STBU"/>.
-        /// </summary>
-        public const string SerializableFailureMechanismTypeSTBU = "STBU";
-
-        /// <summary>
         /// Identifier for <see cref="SerializableFailureMechanismType.STPH"/>.
         /// </summary>
         public const string SerializableFailureMechanismTypeSTPH = "STPH";
Index: Riskeer/AssemblyTool/src/Riskeer.AssemblyTool.IO/Model/Enums/SerializableFailureMechanismType.cs
===================================================================
diff -u -r6c588547f675ffa2b9f3e55315269e57cb52ccbe -re895524af739651c3e160a75f7c1fa6f361dcae4
--- Riskeer/AssemblyTool/src/Riskeer.AssemblyTool.IO/Model/Enums/SerializableFailureMechanismType.cs	(.../SerializableFailureMechanismType.cs)	(revision 6c588547f675ffa2b9f3e55315269e57cb52ccbe)
+++ Riskeer/AssemblyTool/src/Riskeer.AssemblyTool.IO/Model/Enums/SerializableFailureMechanismType.cs	(.../SerializableFailureMechanismType.cs)	(revision e895524af739651c3e160a75f7c1fa6f361dcae4)
@@ -35,12 +35,6 @@
         STBI = 1,
 
         /// <summary>
-        /// Represents the failure mechanism macro stability outwards.
-        /// </summary>
-        [XmlEnum(AssemblyXmlEnumIdentifiers.SerializableFailureMechanismTypeSTBU)]
-        STBU = 2,
-
-        /// <summary>
         /// Represents the failure mechanism piping.
         /// </summary>
         [XmlEnum(AssemblyXmlEnumIdentifiers.SerializableFailureMechanismTypeSTPH)]
Index: Riskeer/AssemblyTool/test/Riskeer.AssemblyTool.IO.Test/Model/Enums/AssemblyXmlEnumIdentifiersTest.cs
===================================================================
diff -u -rfa3389c99cd0c94dfad0be6cb9c8a6a43df45e35 -re895524af739651c3e160a75f7c1fa6f361dcae4
--- Riskeer/AssemblyTool/test/Riskeer.AssemblyTool.IO.Test/Model/Enums/AssemblyXmlEnumIdentifiersTest.cs	(.../AssemblyXmlEnumIdentifiersTest.cs)	(revision fa3389c99cd0c94dfad0be6cb9c8a6a43df45e35)
+++ Riskeer/AssemblyTool/test/Riskeer.AssemblyTool.IO.Test/Model/Enums/AssemblyXmlEnumIdentifiersTest.cs	(.../AssemblyXmlEnumIdentifiersTest.cs)	(revision e895524af739651c3e160a75f7c1fa6f361dcae4)
@@ -84,7 +84,6 @@
             Assert.AreEqual("GEEN", AssemblyXmlEnumIdentifiers.SerializableFailureMechanismGroup4);
 
             Assert.AreEqual("STBI", AssemblyXmlEnumIdentifiers.SerializableFailureMechanismTypeSTBI);
-            Assert.AreEqual("STBU", AssemblyXmlEnumIdentifiers.SerializableFailureMechanismTypeSTBU);
             Assert.AreEqual("STPH", AssemblyXmlEnumIdentifiers.SerializableFailureMechanismTypeSTPH);
             Assert.AreEqual("STMI", AssemblyXmlEnumIdentifiers.SerializableFailureMechanismTypeSTMI);
             Assert.AreEqual("AGK", AssemblyXmlEnumIdentifiers.SerializableFailureMechanismTypeAGK);
Index: Riskeer/AssemblyTool/test/Riskeer.AssemblyTool.IO.Test/Model/Enums/SerializableFailureMechanismTypeTest.cs
===================================================================
diff -u -rfa3389c99cd0c94dfad0be6cb9c8a6a43df45e35 -re895524af739651c3e160a75f7c1fa6f361dcae4
--- Riskeer/AssemblyTool/test/Riskeer.AssemblyTool.IO.Test/Model/Enums/SerializableFailureMechanismTypeTest.cs	(.../SerializableFailureMechanismTypeTest.cs)	(revision fa3389c99cd0c94dfad0be6cb9c8a6a43df45e35)
+++ Riskeer/AssemblyTool/test/Riskeer.AssemblyTool.IO.Test/Model/Enums/SerializableFailureMechanismTypeTest.cs	(.../SerializableFailureMechanismTypeTest.cs)	(revision e895524af739651c3e160a75f7c1fa6f361dcae4)
@@ -39,9 +39,6 @@
                         SerializableFailureMechanismType.STBI, 1
                     },
                     {
-                        SerializableFailureMechanismType.STBU, 2
-                    },
-                    {
                         SerializableFailureMechanismType.STPH, 3
                     },
                     {
@@ -103,9 +100,6 @@
                         SerializableFailureMechanismType.STBI, "STBI"
                     },
                     {
-                        SerializableFailureMechanismType.STBU, "STBU"
-                    },
-                    {
                         SerializableFailureMechanismType.STPH, "STPH"
                     },
                     {