Index: Riskeer/Piping/src/Riskeer.Piping.Data/Probabilistic/ProbabilisticPipingOutput.cs
===================================================================
diff -u -r9c83f4ae54b59848d77ee3c42f0d1a408da8e49d -rfe7119eba5c17b1a7bb18abfdb7879cde5474982
--- Riskeer/Piping/src/Riskeer.Piping.Data/Probabilistic/ProbabilisticPipingOutput.cs	(.../ProbabilisticPipingOutput.cs)	(revision 9c83f4ae54b59848d77ee3c42f0d1a408da8e49d)
+++ Riskeer/Piping/src/Riskeer.Piping.Data/Probabilistic/ProbabilisticPipingOutput.cs	(.../ProbabilisticPipingOutput.cs)	(revision fe7119eba5c17b1a7bb18abfdb7879cde5474982)
@@ -19,6 +19,7 @@
 // Stichting Deltares and remain full property of Stichting Deltares at all times.
 // All rights reserved.
 
+using System;
 using Core.Common.Base;
 using Riskeer.Common.Data.Calculation;
 
@@ -34,10 +35,19 @@
         /// </summary>
         /// <param name="sectionSpecificOutput">The result of the sub-calculation that takes into account the section length.</param>
         /// <param name="profileSpecificOutput">The result of the sub-calculation that doesn't take into account the section length.</param>
-        /// <remarks>The input parameters are not checked for being <c>null</c> as (one of the) the sub-calculation results might
-        /// be missing due to calculation failure.</remarks>
+        /// <exception cref="ArgumentNullException">Thrown when any input parameter is <c>null</c>.</exception>
         public ProbabilisticPipingOutput(PartialProbabilisticPipingOutput sectionSpecificOutput, PartialProbabilisticPipingOutput profileSpecificOutput)
         {
+            if (sectionSpecificOutput == null)
+            {
+                throw new ArgumentNullException(nameof(sectionSpecificOutput));
+            }
+
+            if (profileSpecificOutput == null)
+            {
+                throw new ArgumentNullException(nameof(profileSpecificOutput));
+            }
+
             SectionSpecificOutput = sectionSpecificOutput;
             ProfileSpecificOutput = profileSpecificOutput;
         }
Index: Riskeer/Piping/test/Riskeer.Piping.Data.Test/Probabilistic/ProbabilisticPipingOutputTest.cs
===================================================================
diff -u -r0db900067fe7ee0998170840b48b45b9d73425bd -rfe7119eba5c17b1a7bb18abfdb7879cde5474982
--- Riskeer/Piping/test/Riskeer.Piping.Data.Test/Probabilistic/ProbabilisticPipingOutputTest.cs	(.../ProbabilisticPipingOutputTest.cs)	(revision 0db900067fe7ee0998170840b48b45b9d73425bd)
+++ Riskeer/Piping/test/Riskeer.Piping.Data.Test/Probabilistic/ProbabilisticPipingOutputTest.cs	(.../ProbabilisticPipingOutputTest.cs)	(revision fe7119eba5c17b1a7bb18abfdb7879cde5474982)
@@ -34,6 +34,32 @@
     public class ProbabilisticPipingOutputTest
     {
         [Test]
+        public void Constructor_SectionSpecificOutputNull_ThrowsArgumentNullException()
+        {
+            // Call
+            void Call() => new ProbabilisticPipingOutput(
+                null,
+                PipingTestDataGenerator.GetRandomPartialProbabilisticPipingOutput(new TestGeneralResultFaultTreeIllustrationPoint()));
+
+            // Assert
+            string paramName = Assert.Throws<ArgumentNullException>(Call).ParamName;
+            Assert.AreEqual("sectionSpecificOutput", paramName);
+        }
+
+        [Test]
+        public void Constructor_ProfileSpecificOutputNull_ThrowsArgumentNullException()
+        {
+            // Call
+            void Call() => new ProbabilisticPipingOutput(
+                PipingTestDataGenerator.GetRandomPartialProbabilisticPipingOutput(new TestGeneralResultFaultTreeIllustrationPoint()),
+                null);
+
+            // Assert
+            string paramName = Assert.Throws<ArgumentNullException>(Call).ParamName;
+            Assert.AreEqual("profileSpecificOutput", paramName);
+        }
+
+        [Test]
         public void Constructor_ExpectedValues()
         {
             // Setup
@@ -101,62 +127,6 @@
         }
 
         [Test]
-        public void ClearIllustrationPoints_NoOutput_DoesNotThrow()
-        {
-            // Setup
-            var output = new ProbabilisticPipingOutput(null, null);
-
-            // Call
-            void Call() => output.ClearIllustrationPoints();
-
-            // Assert
-            Assert.DoesNotThrow(Call);
-        }
-
-        [Test]
-        public void Clone_NoPropertiesSet_ReturnNewInstanceWithCopiedValues()
-        {
-            // Setup
-            var original = new ProbabilisticPipingOutput(null, null);
-
-            // Call
-            object clone = original.Clone();
-
-            // Assert
-            CoreCloneAssert.AreObjectClones(original, clone, PipingCloneAssert.AreClones);
-        }
-
-        [Test]
-        public void Clone_OnlySectionSpecificOutputSet_ReturnNewInstanceWithCopiedValues()
-        {
-            // Setup
-            var original = new ProbabilisticPipingOutput(
-                PipingTestDataGenerator.GetRandomPartialProbabilisticPipingOutput(new TestGeneralResultFaultTreeIllustrationPoint()),
-                null);
-
-            // Call
-            object clone = original.Clone();
-
-            // Assert
-            CoreCloneAssert.AreObjectClones(original, clone, PipingCloneAssert.AreClones);
-        }
-
-        [Test]
-        public void Clone_OnlyProfileSpecificOutputSet_ReturnNewInstanceWithCopiedValues()
-        {
-            // Setup
-            var original = new ProbabilisticPipingOutput(
-                null,
-                PipingTestDataGenerator.GetRandomPartialProbabilisticPipingOutput(new TestGeneralResultFaultTreeIllustrationPoint()));
-
-            // Call
-            object clone = original.Clone();
-
-            // Assert
-            CoreCloneAssert.AreObjectClones(original, clone, PipingCloneAssert.AreClones);
-        }
-
-        [Test]
         public void Clone_AllPropertiesSet_ReturnNewInstanceWithCopiedValues()
         {
             // Setup