Index: Riskeer/AssemblyTool/src/Riskeer.AssemblyTool.IO/Model/DataTypes/SerializableFailureMechanismSectionAssemblyResult.cs
===================================================================
diff -u -r0102f161e02186c2fb3d2990d168d7271c1b1085 -r0e70ef1cfe58df312e2649df77ae41710f9b4817
--- Riskeer/AssemblyTool/src/Riskeer.AssemblyTool.IO/Model/DataTypes/SerializableFailureMechanismSectionAssemblyResult.cs	(.../SerializableFailureMechanismSectionAssemblyResult.cs)	(revision 0102f161e02186c2fb3d2990d168d7271c1b1085)
+++ Riskeer/AssemblyTool/src/Riskeer.AssemblyTool.IO/Model/DataTypes/SerializableFailureMechanismSectionAssemblyResult.cs	(.../SerializableFailureMechanismSectionAssemblyResult.cs)	(revision 0e70ef1cfe58df312e2649df77ae41710f9b4817)
@@ -80,12 +80,13 @@
         
         /// <summary>
         /// Determines whether <see cref="Probability"/> should be serialized.
-        /// Gets or sets the status of this assembly result.
         /// </summary>
-        /// <returns>The indicator whether <see cref="Probability"/> should be serialized.</returns>
+        /// <returns><c>false</c> when <see cref="Probability"/> is <c>null</c>
+        /// or <see cref="AssemblyGroup"/> is <see cref="SerializableFailureMechanismSectionAssemblyGroup.NotDominant"/>;
+        /// <c>true</c> otherwise.</returns>
         public bool ShouldSerializeProbability()
         {
-            return Probability.HasValue;
+            return Probability.HasValue && AssemblyGroup != SerializableFailureMechanismSectionAssemblyGroup.NotDominant;
         }
     }
 }
\ No newline at end of file
Index: Riskeer/AssemblyTool/test/Riskeer.AssemblyTool.IO.Test/Model/DataTypes/SerializableFailureMechanismSectionAssemblyResultTest.cs
===================================================================
diff -u -r0102f161e02186c2fb3d2990d168d7271c1b1085 -r0e70ef1cfe58df312e2649df77ae41710f9b4817
--- Riskeer/AssemblyTool/test/Riskeer.AssemblyTool.IO.Test/Model/DataTypes/SerializableFailureMechanismSectionAssemblyResultTest.cs	(.../SerializableFailureMechanismSectionAssemblyResultTest.cs)	(revision 0102f161e02186c2fb3d2990d168d7271c1b1085)
+++ Riskeer/AssemblyTool/test/Riskeer.AssemblyTool.IO.Test/Model/DataTypes/SerializableFailureMechanismSectionAssemblyResultTest.cs	(.../SerializableFailureMechanismSectionAssemblyResultTest.cs)	(revision 0e70ef1cfe58df312e2649df77ae41710f9b4817)
@@ -73,9 +73,17 @@
         }
         
         [Test]
-        [TestCase(0.5)]
-        [TestCase(double.NaN)]
-        public void ShouldSerializeProbability_WithProbabilityValues_ReturnsTrue(double probability)
+        [Combinatorial]
+        public void ShouldSerializeProbability_WithProbabilityAndAssemblyGroupOtherThanNotDominant_ReturnsTrue(
+            [Values(0.5, double.NaN)] double probability,
+            [Values(SerializableFailureMechanismSectionAssemblyGroup.III,
+                    SerializableFailureMechanismSectionAssemblyGroup.II,
+                    SerializableFailureMechanismSectionAssemblyGroup.I,
+                    SerializableFailureMechanismSectionAssemblyGroup.Zero,
+                    SerializableFailureMechanismSectionAssemblyGroup.IMin,
+                    SerializableFailureMechanismSectionAssemblyGroup.IIMin,
+                    SerializableFailureMechanismSectionAssemblyGroup.IIIMin)] 
+            SerializableFailureMechanismSectionAssemblyGroup assemblyGroup)
         {
             // Setup
             var random = new Random(39);
@@ -92,12 +100,29 @@
         }
 
         [Test]
-        public void ShouldSerializeProbability_WithoutProbabilityValues_ReturnsFalse()
+        public void ShouldSerializeProbability_WithProbabilityAndAssemblyGroupNotDominant_ReturnsFalse()
         {
             // Setup
             var random = new Random(39);
             var assemblyResult = new SerializableFailureMechanismSectionAssemblyResult(
                 random.NextEnumValue<SerializableAssemblyMethod>(),
+                SerializableFailureMechanismSectionAssemblyGroup.NotDominant,
+                random.NextDouble());
+
+            // Call
+            bool shouldSerialize = assemblyResult.ShouldSerializeProbability();
+
+            // Assert
+            Assert.IsFalse(shouldSerialize);
+        }
+
+        [Test]
+        public void ShouldSerializeProbability_WithoutProbability_ReturnsFalse()
+        {
+            // Setup
+            var random = new Random(39);
+            var assemblyResult = new SerializableFailureMechanismSectionAssemblyResult(
+                random.NextEnumValue<SerializableAssemblyMethod>(),
                 random.NextEnumValue<SerializableFailureMechanismSectionAssemblyGroup>());
 
             // Call