Index: Riskeer/Common/src/Riskeer.Common.Data/FailureMechanism/FailureMechanismSectionResult.cs
===================================================================
diff -u -r54c12cd1360987abd052df8dbe9bc1bdb9990857 -re78071f096ccc818755a252dff3d621aac358a20
--- Riskeer/Common/src/Riskeer.Common.Data/FailureMechanism/FailureMechanismSectionResult.cs	(.../FailureMechanismSectionResult.cs)	(revision 54c12cd1360987abd052df8dbe9bc1bdb9990857)
+++ Riskeer/Common/src/Riskeer.Common.Data/FailureMechanism/FailureMechanismSectionResult.cs	(.../FailureMechanismSectionResult.cs)	(revision e78071f096ccc818755a252dff3d621aac358a20)
@@ -57,12 +57,12 @@
         /// Gets the encapsulated <see cref="FailureMechanismSection"/>.
         /// </summary>
         public FailureMechanismSection Section { get; }
-        
+
         /// <summary>
         /// Gets or sets whether the section is relevant.
         /// </summary>
         public bool IsRelevant { get; set; }
-        
+
         /// <summary>
         /// Gets or sets the initial failure mechanism result.
         /// </summary>
@@ -88,9 +88,9 @@
         /// Gets or sets whether further analysis is needed.
         /// </summary>
         public bool FurtherAnalysisNeeded { get; set; }
-        
+
         /// <summary>
-        /// Gets or sets the value of the refined probability.
+        /// Gets or sets the value of the refined probability per failure mechanism section.
         /// </summary>
         /// <exception cref="ArgumentOutOfRangeException">Thrown when <paramref name="value"/> is not in range [0,1].</exception>
         public double RefinedSectionProbability
Index: Riskeer/Common/test/Riskeer.Common.Data.Test/FailureMechanism/FailureMechanismSectionResultTest.cs
===================================================================
diff -u -r54c12cd1360987abd052df8dbe9bc1bdb9990857 -re78071f096ccc818755a252dff3d621aac358a20
--- Riskeer/Common/test/Riskeer.Common.Data.Test/FailureMechanism/FailureMechanismSectionResultTest.cs	(.../FailureMechanismSectionResultTest.cs)	(revision 54c12cd1360987abd052df8dbe9bc1bdb9990857)
+++ Riskeer/Common/test/Riskeer.Common.Data.Test/FailureMechanism/FailureMechanismSectionResultTest.cs	(.../FailureMechanismSectionResultTest.cs)	(revision e78071f096ccc818755a252dff3d621aac358a20)
@@ -60,7 +60,7 @@
             var exception = Assert.Throws<ArgumentNullException>(Call);
             Assert.AreEqual("section", exception.ParamName);
         }
-        
+
         [Test]
         [SetCulture("nl-NL")]
         [TestCase(-20)]
@@ -100,7 +100,7 @@
             // Assert
             Assert.AreEqual(newValue, result.ManualInitialFailureMechanismResultSectionProbability);
         }
-        
+
         [Test]
         [SetCulture("nl-NL")]
         [TestCase(-20)]
Index: Riskeer/Piping/src/Riskeer.Piping.Data/PipingFailureMechanismSectionResult.cs
===================================================================
diff -u -rd8e61e1c316db2f6f06f05f4911fd26ea072a0a1 -re78071f096ccc818755a252dff3d621aac358a20
--- Riskeer/Piping/src/Riskeer.Piping.Data/PipingFailureMechanismSectionResult.cs	(.../PipingFailureMechanismSectionResult.cs)	(revision d8e61e1c316db2f6f06f05f4911fd26ea072a0a1)
+++ Riskeer/Piping/src/Riskeer.Piping.Data/PipingFailureMechanismSectionResult.cs	(.../PipingFailureMechanismSectionResult.cs)	(revision e78071f096ccc818755a252dff3d621aac358a20)
@@ -33,6 +33,7 @@
     public class PipingFailureMechanismSectionResult : FailureMechanismSectionResult
     {
         private double manualInitialFailureMechanismResultProfileProbability;
+        private double refinedProfileProbability;
 
         /// <inheritdoc />
         /// <summary>
@@ -42,8 +43,10 @@
             : base(section)
         {
             ManualInitialFailureMechanismResultProfileProbability = double.NaN;
+            ProbabilityRefinementType = ProbabilityRefinementType.Section;
+            RefinedProfileProbability = double.NaN;
         }
-        
+
         /// <summary>
         /// Gets or sets the value of the manual initial failure mechanism result per profile as a probability.
         /// </summary>
@@ -59,5 +62,26 @@
                 manualInitialFailureMechanismResultProfileProbability = value;
             }
         }
+
+        /// <summary>
+        /// Gets or sets the probability refinement type.
+        /// </summary>
+        public ProbabilityRefinementType ProbabilityRefinementType { get; set; }
+
+        /// <summary>
+        /// Gets or sets the value of the refined probability per profile.
+        /// </summary>
+        /// <exception cref="ArgumentOutOfRangeException">Thrown when <paramref name="value"/> is not in range [0,1].</exception>
+        public double RefinedProfileProbability
+        {
+            get => refinedProfileProbability;
+            set
+            {
+                ProbabilityHelper.ValidateProbability(value, null,
+                                                      RiskeerCommonDataResources.ArbitraryProbabilityFailureMechanismSectionResult_AssessmentProbability_Value_needs_to_be_in_Range_0_,
+                                                      true);
+                refinedProfileProbability = value;
+            }
+        }
     }
 }
\ No newline at end of file
Index: Riskeer/Piping/test/Riskeer.Piping.Data.Test/PipingFailureMechanismSectionResultTest.cs
===================================================================
diff -u -rd8e61e1c316db2f6f06f05f4911fd26ea072a0a1 -re78071f096ccc818755a252dff3d621aac358a20
--- Riskeer/Piping/test/Riskeer.Piping.Data.Test/PipingFailureMechanismSectionResultTest.cs	(.../PipingFailureMechanismSectionResultTest.cs)	(revision d8e61e1c316db2f6f06f05f4911fd26ea072a0a1)
+++ Riskeer/Piping/test/Riskeer.Piping.Data.Test/PipingFailureMechanismSectionResultTest.cs	(.../PipingFailureMechanismSectionResultTest.cs)	(revision e78071f096ccc818755a252dff3d621aac358a20)
@@ -39,6 +39,7 @@
             // Assert
             Assert.IsInstanceOf<FailureMechanismSectionResult>(sectionResult);
             Assert.IsNaN(sectionResult.ManualInitialFailureMechanismResultProfileProbability);
+            Assert.AreEqual(ProbabilityRefinementType.Section, sectionResult.ProbabilityRefinementType);
         }
 
         [Test]
@@ -80,5 +81,45 @@
             // Assert
             Assert.AreEqual(newValue, result.ManualInitialFailureMechanismResultProfileProbability);
         }
+
+        [Test]
+        [SetCulture("nl-NL")]
+        [TestCase(-20)]
+        [TestCase(-1e-6)]
+        [TestCase(1 + 1e-6)]
+        [TestCase(12)]
+        public void RefinedProfileProbability_InvalidValue_ThrowsArgumentOutOfRangeException(double newValue)
+        {
+            // Setup
+            FailureMechanismSection section = FailureMechanismSectionTestFactory.CreateFailureMechanismSection();
+            var result = new PipingFailureMechanismSectionResult(section);
+
+            // Call
+            void Call() => result.RefinedProfileProbability = newValue;
+
+            // Assert
+            const string message = "De waarde voor de faalkans moet in het bereik [0,0, 1,0] liggen.";
+            TestHelper.AssertThrowsArgumentExceptionAndTestMessage<ArgumentOutOfRangeException>(Call, message);
+        }
+
+        [Test]
+        [TestCase(0)]
+        [TestCase(1e-6)]
+        [TestCase(0.5)]
+        [TestCase(1 - 1e-6)]
+        [TestCase(1)]
+        [TestCase(double.NaN)]
+        public void RefinedProfileProbability_ValidValue_NewValueSet(double newValue)
+        {
+            // Setup
+            FailureMechanismSection section = FailureMechanismSectionTestFactory.CreateFailureMechanismSection();
+            var result = new PipingFailureMechanismSectionResult(section);
+
+            // Call
+            result.RefinedProfileProbability = newValue;
+
+            // Assert
+            Assert.AreEqual(newValue, result.RefinedProfileProbability);
+        }
     }
 }
\ No newline at end of file