Index: Ringtoets/MacroStabilityInwards/src/Ringtoets.MacroStabilityInwards.Data/MacroStabilityInwardsCalculation.cs
===================================================================
diff -u -rd619624819b7200ac55b357b0a0c54d198fc20e4 -r2bdb4415eafe18b5780dbc32408a7317d7b537e6
--- Ringtoets/MacroStabilityInwards/src/Ringtoets.MacroStabilityInwards.Data/MacroStabilityInwardsCalculation.cs	(.../MacroStabilityInwardsCalculation.cs)	(revision d619624819b7200ac55b357b0a0c54d198fc20e4)
+++ Ringtoets/MacroStabilityInwards/src/Ringtoets.MacroStabilityInwards.Data/MacroStabilityInwardsCalculation.cs	(.../MacroStabilityInwardsCalculation.cs)	(revision 2bdb4415eafe18b5780dbc32408a7317d7b537e6)
@@ -19,7 +19,6 @@
 // Stichting Deltares and remain full property of Stichting Deltares at all times.
 // All rights reserved.
 
-using System;
 using Core.Common.Base;
 using Ringtoets.Common.Data;
 using Ringtoets.Common.Data.Calculation;
@@ -30,7 +29,7 @@
     /// <summary>
     /// This class holds information about a calculation for the <see cref="MacroStabilityInwardsFailureMechanism"/>.
     /// </summary>
-    public class MacroStabilityInwardsCalculation : Observable, ICalculation
+    public class MacroStabilityInwardsCalculation : CloneableObservable, ICalculation
     {
         /// <summary>
         /// Creates a new instance of <see cref="MacroStabilityInwardsCalculation"/> with default values set for some of the parameters.
@@ -45,7 +44,7 @@
         /// <summary>
         /// Gets the input parameters to perform a macro stability inwards calculation with.
         /// </summary>
-        public MacroStabilityInwardsInput InputParameters { get; }
+        public MacroStabilityInwardsInput InputParameters { get; private set; }
 
         /// <summary>
         /// Gets or sets <see cref="MacroStabilityInwardsOutput"/>, which contains the results of a macro stability inwards calculation.
@@ -67,17 +66,31 @@
             }
         }
 
-        public Comment Comments { get; }
+        public Comment Comments { get; private set; }
 
         public void ClearOutput()
         {
             Output = null;
             SemiProbabilisticOutput = null;
         }
 
-        public object Clone()
+        public override object Clone()
         {
-            throw new NotImplementedException();
+            var clone = (MacroStabilityInwardsCalculation) base.Clone();
+            clone.Comments = (Comment) Comments.Clone();
+            clone.InputParameters = (MacroStabilityInwardsInput) InputParameters.Clone();
+
+            if (Output != null)
+            {
+                clone.Output = (MacroStabilityInwardsOutput) Output.Clone();
+            }
+
+            if (SemiProbabilisticOutput != null)
+            {
+                clone.SemiProbabilisticOutput = (MacroStabilityInwardsSemiProbabilisticOutput) SemiProbabilisticOutput.Clone();
+            }
+
+            return clone;
         }
     }
 }
\ No newline at end of file
Index: Ringtoets/MacroStabilityInwards/test/Ringtoets.MacroStabilityInwards.Data.Test/MacroStabilityInwardsCalculationScenarioTest.cs
===================================================================
diff -u -rb2f4b307c254c747a5cf01d2fb94970e5e954c36 -r2bdb4415eafe18b5780dbc32408a7317d7b537e6
--- Ringtoets/MacroStabilityInwards/test/Ringtoets.MacroStabilityInwards.Data.Test/MacroStabilityInwardsCalculationScenarioTest.cs	(.../MacroStabilityInwardsCalculationScenarioTest.cs)	(revision b2f4b307c254c747a5cf01d2fb94970e5e954c36)
+++ Ringtoets/MacroStabilityInwards/test/Ringtoets.MacroStabilityInwards.Data.Test/MacroStabilityInwardsCalculationScenarioTest.cs	(.../MacroStabilityInwardsCalculationScenarioTest.cs)	(revision 2bdb4415eafe18b5780dbc32408a7317d7b537e6)
@@ -21,6 +21,8 @@
 
 using System;
 using Core.Common.Base.Data;
+using Core.Common.Data.TestUtil;
+using Core.Common.TestUtil;
 using NUnit.Framework;
 using Ringtoets.Common.Data.Calculation;
 using Ringtoets.MacroStabilityInwards.Data.TestUtil;
@@ -175,5 +177,29 @@
             // Assert
             Assert.AreEqual(CalculationScenarioStatus.Done, status);
         }
+
+        [Test]
+        public void Clone_WithRandomValues_ReturnsCopiedInstanceWithPropertiesSet()
+        {
+            // Setup
+            MacroStabilityInwardsCalculationScenario original = CreateRandomCalculationScenarioWithoutOutput();
+
+            // Call
+            object clone = original.Clone();
+
+            // Assert
+            CoreCloneAssert.AreObjectClones(original, clone, MacroStabilityInwardsCloneAssert.AreClones);
+        }
+
+        private static MacroStabilityInwardsCalculationScenario CreateRandomCalculationScenarioWithoutOutput()
+        {
+            var random = new Random(21);
+
+            return new MacroStabilityInwardsCalculationScenario
+            {
+                IsRelevant = random.NextBoolean(),
+                Contribution = random.NextRoundedDouble()
+            };
+        }
     }
 }
\ No newline at end of file
Index: Ringtoets/MacroStabilityInwards/test/Ringtoets.MacroStabilityInwards.Data.Test/MacroStabilityInwardsCalculationTest.cs
===================================================================
diff -u -rb2f4b307c254c747a5cf01d2fb94970e5e954c36 -r2bdb4415eafe18b5780dbc32408a7317d7b537e6
--- Ringtoets/MacroStabilityInwards/test/Ringtoets.MacroStabilityInwards.Data.Test/MacroStabilityInwardsCalculationTest.cs	(.../MacroStabilityInwardsCalculationTest.cs)	(revision b2f4b307c254c747a5cf01d2fb94970e5e954c36)
+++ Ringtoets/MacroStabilityInwards/test/Ringtoets.MacroStabilityInwards.Data.Test/MacroStabilityInwardsCalculationTest.cs	(.../MacroStabilityInwardsCalculationTest.cs)	(revision 2bdb4415eafe18b5780dbc32408a7317d7b537e6)
@@ -19,7 +19,10 @@
 // Stichting Deltares and remain full property of Stichting Deltares at all times.
 // All rights reserved.
 
+using System;
 using Core.Common.Base;
+using Core.Common.Data.TestUtil;
+using Core.Common.TestUtil;
 using NUnit.Framework;
 using Rhino.Mocks;
 using Ringtoets.Common.Data.Calculation;
@@ -46,6 +49,7 @@
 
             // Assert
             Assert.IsInstanceOf<ICalculation>(calculation);
+            Assert.IsInstanceOf<CloneableObservable>(calculation);
 
             Assert.AreEqual("Nieuwe berekening", calculation.Name);
 
@@ -215,5 +219,54 @@
             // Assert
             Assert.IsTrue(calculationHasOutput);
         }
+
+        [Test]
+        public void Clone_NoOutput_ReturnNewInstanceWithCopiedValues()
+        {
+            // Setup
+            MacroStabilityInwardsCalculation original = CreateRandomCalculationWithoutOutput();
+
+            // Call
+            object clone = original.Clone();
+
+            // Assert
+            CoreCloneAssert.AreObjectClones(original, clone, MacroStabilityInwardsCloneAssert.AreClones);
+        }
+
+        [Test]
+        public void Clone_WithOutput_ReturnNewInstanceWithCopiedValues()
+        {
+            // Setup
+            MacroStabilityInwardsCalculation original = CreateRandomCalculationWithoutOutput();
+            original.SemiProbabilisticOutput = MacroStabilityInwardsSemiProbabilisticOutputTestFactory.CreateOutput();
+            original.Output = MacroStabilityInwardsOutputTestFactory.CreateOutput();
+
+            // Call
+            object clone = original.Clone();
+
+            // Assert
+            CoreCloneAssert.AreObjectClones(original, clone, MacroStabilityInwardsCloneAssert.AreClones);
+        }
+
+        private static MacroStabilityInwardsCalculation CreateRandomCalculationWithoutOutput()
+        {
+            var random = new Random(21);
+
+            return new MacroStabilityInwardsCalculation
+            {
+                Name = "A Name",
+                Comments =
+                {
+                    Body = "A comment"
+                },
+                InputParameters =
+                {
+                    SlipPlaneMinimumDepth = random.NextRoundedDouble(),
+                    SlipPlaneMinimumLength = random.NextRoundedDouble(),
+                    MaximumSliceWidth = random.NextRoundedDouble(),
+                    MoveGrid = random.NextBoolean()
+                }
+            };
+        }
     }
 }
\ No newline at end of file
Index: Ringtoets/MacroStabilityInwards/test/Ringtoets.MacroStabilityInwards.Data.TestUtil.Test/MacroStabilityInwardsSemiProbabilisticTestFactoryTest.cs
===================================================================
diff -u -rc4c3d9ffd55bea465d56419d1e6ddbfe35fe355a -r2bdb4415eafe18b5780dbc32408a7317d7b537e6
--- Ringtoets/MacroStabilityInwards/test/Ringtoets.MacroStabilityInwards.Data.TestUtil.Test/MacroStabilityInwardsSemiProbabilisticTestFactoryTest.cs	(.../MacroStabilityInwardsSemiProbabilisticTestFactoryTest.cs)	(revision c4c3d9ffd55bea465d56419d1e6ddbfe35fe355a)
+++ Ringtoets/MacroStabilityInwards/test/Ringtoets.MacroStabilityInwards.Data.TestUtil.Test/MacroStabilityInwardsSemiProbabilisticTestFactoryTest.cs	(.../MacroStabilityInwardsSemiProbabilisticTestFactoryTest.cs)	(revision 2bdb4415eafe18b5780dbc32408a7317d7b537e6)
@@ -52,7 +52,7 @@
         {
             // Setup
             var random = new Random(21);
-            var probability = random.NextDouble();
+            double probability = random.NextDouble();
 
             // Call
             MacroStabilityInwardsSemiProbabilisticOutput output = MacroStabilityInwardsSemiProbabilisticOutputTestFactory.CreateOutput(probability);
Index: Ringtoets/MacroStabilityInwards/test/Ringtoets.MacroStabilityInwards.Data.TestUtil/MacroStabilityInwardsCloneAssert.cs
===================================================================
diff -u -r6c09ce8d05935f9056bfd3a811da825326135472 -r2bdb4415eafe18b5780dbc32408a7317d7b537e6
--- Ringtoets/MacroStabilityInwards/test/Ringtoets.MacroStabilityInwards.Data.TestUtil/MacroStabilityInwardsCloneAssert.cs	(.../MacroStabilityInwardsCloneAssert.cs)	(revision 6c09ce8d05935f9056bfd3a811da825326135472)
+++ Ringtoets/MacroStabilityInwards/test/Ringtoets.MacroStabilityInwards.Data.TestUtil/MacroStabilityInwardsCloneAssert.cs	(.../MacroStabilityInwardsCloneAssert.cs)	(revision 2bdb4415eafe18b5780dbc32408a7317d7b537e6)
@@ -39,6 +39,22 @@
         /// <param name="clone">The cloned object.</param>
         /// <exception cref="AssertionException">Thrown when <paramref name="original"/> and
         /// <paramref name="clone"/> are not clones.</exception>
+        public static void AreClones(MacroStabilityInwardsCalculationScenario original,
+                                     MacroStabilityInwardsCalculationScenario clone)
+        {
+            Assert.AreEqual(original.Contribution, clone.Contribution);
+            Assert.AreEqual(original.IsRelevant, clone.IsRelevant);
+            AreClones((MacroStabilityInwardsCalculation) original, clone);
+        }
+
+        /// <summary>
+        /// Method that asserts whether <paramref name="original"/> and <paramref name="clone"/>
+        /// are clones.
+        /// </summary>
+        /// <param name="original">The original object.</param>
+        /// <param name="clone">The cloned object.</param>
+        /// <exception cref="AssertionException">Thrown when <paramref name="original"/> and
+        /// <paramref name="clone"/> are not clones.</exception>
         public static void AreClones(MacroStabilityInwardsCalculation original,
                                      MacroStabilityInwardsCalculation clone)
         {