Index: Core/Common/src/Core.Common.Base/ObservableUniqueItemCollectionWithSourcePath.cs
===================================================================
diff -u -r6cdb90fc3f89fe0c44b62d3be7266a0090a6b891 -rc29ddf2e68499841e1d892129d60a42adc4ac134
--- Core/Common/src/Core.Common.Base/ObservableUniqueItemCollectionWithSourcePath.cs	(.../ObservableUniqueItemCollectionWithSourcePath.cs)	(revision 6cdb90fc3f89fe0c44b62d3be7266a0090a6b891)
+++ Core/Common/src/Core.Common.Base/ObservableUniqueItemCollectionWithSourcePath.cs	(.../ObservableUniqueItemCollectionWithSourcePath.cs)	(revision c29ddf2e68499841e1d892129d60a42adc4ac134)
@@ -77,7 +77,7 @@
         /// <param name="i">The index.</param>
         /// <returns>The element at index <paramref name="i"/> in the collection.</returns>
         /// <exception cref="ArgumentOutOfRangeException">Thrown when <paramref name="i"/> is not 
-        /// between [0, <see cref="Count"/>)</exception>
+        /// between [0, <see cref="Count"/>]</exception>
         public TElement this[int i]
         {
             get
Index: Riskeer/Common/src/Riskeer.Common.Data/Calculation/ICalculationScenario.cs
===================================================================
diff -u -r0a2ccc1740669e48d2c629e5bcfe3283f730b2f5 -rc29ddf2e68499841e1d892129d60a42adc4ac134
--- Riskeer/Common/src/Riskeer.Common.Data/Calculation/ICalculationScenario.cs	(.../ICalculationScenario.cs)	(revision 0a2ccc1740669e48d2c629e5bcfe3283f730b2f5)
+++ Riskeer/Common/src/Riskeer.Common.Data/Calculation/ICalculationScenario.cs	(.../ICalculationScenario.cs)	(revision c29ddf2e68499841e1d892129d60a42adc4ac134)
@@ -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.Data;
 
 namespace Riskeer.Common.Data.Calculation
@@ -36,6 +37,8 @@
         /// <summary>
         /// Gets or sets the contribution of the scenario.
         /// </summary>
+        /// <exception cref="ArgumentOutOfRangeException">Thrown when <paramref name="value"/> is not 
+        /// between [0, 1].</exception>
         RoundedDouble Contribution { get; set; }
     }
 }
\ No newline at end of file
Index: Riskeer/Common/src/Riskeer.Common.Data/Helpers/CalculationScenarioHelper.cs
===================================================================
diff -u
--- Riskeer/Common/src/Riskeer.Common.Data/Helpers/CalculationScenarioHelper.cs	(revision 0)
+++ Riskeer/Common/src/Riskeer.Common.Data/Helpers/CalculationScenarioHelper.cs	(revision c29ddf2e68499841e1d892129d60a42adc4ac134)
@@ -0,0 +1,57 @@
+// Copyright (C) Stichting Deltares 2019. All rights reserved.
+//
+// This file is part of Riskeer.
+//
+// Riskeer is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+// 
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program. If not, see <http://www.gnu.org/licenses/>.
+//
+// All names, logos, and references to "Deltares" are registered trademarks of
+// Stichting Deltares and remain full property of Stichting Deltares at all times.
+// All rights reserved.
+
+using System;
+using Core.Common.Base.Data;
+using Riskeer.Common.Data.Calculation;
+using Riskeer.Common.Data.Properties;
+
+namespace Riskeer.Common.Data.Helpers
+{
+    /// <summary>
+    /// Helper class for dealing with <see cref="ICalculationScenario"/>.
+    /// </summary>
+    public static class CalculationScenarioHelper
+    {
+        /// <summary>
+        /// Gets the scenario contribution number of decimal places.
+        /// </summary>
+        public static int ContributionNumberOfDecimalPlaces => 4;
+
+        private static readonly Range<RoundedDouble> contributionValidityRange = new Range<RoundedDouble>(
+            new RoundedDouble(ContributionNumberOfDecimalPlaces),
+            new RoundedDouble(ContributionNumberOfDecimalPlaces, 1.0));
+        
+        /// <summary>
+        /// Validates whether the <paramref name="value"/> is valid.
+        /// </summary>
+        /// <param name="value">The value to validate.</param>
+        /// <exception cref="ArgumentOutOfRangeException">Thrown when <paramref name="value"/> is not 
+        /// between [0, 1].</exception>
+        public static void ValidateScenarioContribution(RoundedDouble value)
+        {
+            if (!contributionValidityRange.InRange(value))
+            {
+                throw new ArgumentOutOfRangeException(null, string.Format(Resources.Contribution_must_be_within_Range_0_and_100));
+            }
+        }
+    }
+}
\ No newline at end of file
Index: Riskeer/Common/src/Riskeer.Common.Data/Structures/StructuresCalculationScenario.cs
===================================================================
diff -u -r7f3ed17a0e466320f1eacc1d55fd4f99016ae6cf -rc29ddf2e68499841e1d892129d60a42adc4ac134
--- Riskeer/Common/src/Riskeer.Common.Data/Structures/StructuresCalculationScenario.cs	(.../StructuresCalculationScenario.cs)	(revision 7f3ed17a0e466320f1eacc1d55fd4f99016ae6cf)
+++ Riskeer/Common/src/Riskeer.Common.Data/Structures/StructuresCalculationScenario.cs	(.../StructuresCalculationScenario.cs)	(revision c29ddf2e68499841e1d892129d60a42adc4ac134)
@@ -19,10 +19,9 @@
 // Stichting Deltares and remain full property of Stichting Deltares at all times.
 // All rights reserved.
 
-using System;
 using Core.Common.Base.Data;
 using Riskeer.Common.Data.Calculation;
-using RiskeerCommonDataResources = Riskeer.Common.Data.Properties.Resources;
+using Riskeer.Common.Data.Helpers;
 
 namespace Riskeer.Common.Data.Structures
 {
@@ -33,17 +32,14 @@
         where T : IStructuresCalculationInput, new()
     {
         private RoundedDouble contribution;
-        private const int contributionNumberOfDecimalPlaces = 4;
-        private readonly Range<RoundedDouble> contributionValidityRange = new Range<RoundedDouble>(new RoundedDouble(contributionNumberOfDecimalPlaces),
-                                                                                                   new RoundedDouble(contributionNumberOfDecimalPlaces, 1.0));
 
         /// <summary>
         /// Creates a new instance of <see cref="StructuresCalculationScenario{T}"/>.
         /// </summary>
         public StructuresCalculationScenario()
         {
             IsRelevant = true;
-            contribution = new RoundedDouble(4, 1);
+            contribution = new RoundedDouble(CalculationScenarioHelper.ContributionNumberOfDecimalPlaces, 1);
         }
 
         public bool IsRelevant { get; set; }
@@ -53,12 +49,9 @@
             get => contribution;
             set
             {
-                RoundedDouble newValue = value.ToPrecision(contributionNumberOfDecimalPlaces);
+                RoundedDouble newValue = value.ToPrecision(CalculationScenarioHelper.ContributionNumberOfDecimalPlaces);
 
-                if (!contributionValidityRange.InRange(newValue))
-                {
-                    throw new ArgumentOutOfRangeException(null, string.Format(RiskeerCommonDataResources.Contribution_must_be_within_Range_0_and_100));
-                }
+                CalculationScenarioHelper.ValidateScenarioContribution(newValue);
 
                 contribution = newValue;
             }
Index: Riskeer/Common/test/Riskeer.Common.Data.Test/Helpers/CalculationScenarioHelperTest.cs
===================================================================
diff -u
--- Riskeer/Common/test/Riskeer.Common.Data.Test/Helpers/CalculationScenarioHelperTest.cs	(revision 0)
+++ Riskeer/Common/test/Riskeer.Common.Data.Test/Helpers/CalculationScenarioHelperTest.cs	(revision c29ddf2e68499841e1d892129d60a42adc4ac134)
@@ -0,0 +1,69 @@
+// Copyright (C) Stichting Deltares 2019. All rights reserved.
+//
+// This file is part of Riskeer.
+//
+// Riskeer is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+// 
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program. If not, see <http://www.gnu.org/licenses/>.
+//
+// All names, logos, and references to "Deltares" are registered trademarks of
+// Stichting Deltares and remain full property of Stichting Deltares at all times.
+// All rights reserved.
+
+using System;
+using Core.Common.Base.Data;
+using Core.Common.TestUtil;
+using NUnit.Framework;
+using Riskeer.Common.Data.Helpers;
+using Riskeer.Common.Data.TestUtil;
+
+namespace Riskeer.Common.Data.Test.Helpers
+{
+    [TestFixture]
+    public class CalculationScenarioHelperTest
+    {
+        [Test]
+        public void ContributionNumberOfDecimalPlaces_Always_ReturnsExpectedValue()
+        {
+            // Call
+            int numberOfDecimalPlaces = CalculationScenarioHelper.ContributionNumberOfDecimalPlaces;
+
+            // Assert
+            Assert.AreEqual(4, numberOfDecimalPlaces);
+        }
+
+        [Test]
+        [TestCaseSource(typeof(CalculationScenarioTestHelper), nameof(CalculationScenarioTestHelper.GetInvalidScenarioContributionValues))]
+        public void ValidateScenarioContribution_InvalidValue_ThrowsArgumentException(double newValue)
+        {
+            
+            // Call
+            void Call() => CalculationScenarioHelper.ValidateScenarioContribution((RoundedDouble) newValue);
+
+            // Assert
+            TestHelper.AssertThrowsArgumentExceptionAndTestMessage<ArgumentOutOfRangeException>(Call, "De waarde moet binnen het bereik [0% en 100%] liggen.");
+        }
+
+        [Test]
+        [TestCase(-0.0)]
+        [TestCase(0.0)]
+        [TestCase(1.0)]
+        public void ValidateScenarioContribution_ValidValue_DoesNotThrow(double newValue)
+        {
+            // Call
+            void Call() => CalculationScenarioHelper.ValidateScenarioContribution((RoundedDouble) newValue);
+
+            // Assert
+            Assert.DoesNotThrow(Call);
+        }
+    }
+}
\ No newline at end of file
Index: Riskeer/Common/test/Riskeer.Common.Data.Test/Riskeer.Common.Data.Test.csproj
===================================================================
diff -u -r08e8d26a0715f0f3db57c1d3e86256aa06934db4 -rc29ddf2e68499841e1d892129d60a42adc4ac134
--- Riskeer/Common/test/Riskeer.Common.Data.Test/Riskeer.Common.Data.Test.csproj	(.../Riskeer.Common.Data.Test.csproj)	(revision 08e8d26a0715f0f3db57c1d3e86256aa06934db4)
+++ Riskeer/Common/test/Riskeer.Common.Data.Test/Riskeer.Common.Data.Test.csproj	(.../Riskeer.Common.Data.Test.csproj)	(revision c29ddf2e68499841e1d892129d60a42adc4ac134)
@@ -6,16 +6,16 @@
     <Reference Include="System.Drawing" />
   </ItemGroup>
   <ItemGroup>
-    <ProjectReference Include="..\..\..\..\Core\Common\src\Core.Common.Base\Core.Common.Base.csproj"/>
-    <ProjectReference Include="..\..\..\..\Core\Common\src\Core.Common.Util\Core.Common.Util.csproj"/>
-    <ProjectReference Include="..\..\..\..\Core\Common\test\Core.Common.Data.TestUtil\Core.Common.Data.TestUtil.csproj"/>
-    <ProjectReference Include="..\..\..\..\Core\Common\test\Core.Common.TestUtil\Core.Common.TestUtil.csproj"/>
-    <ProjectReference Include="..\..\..\AssemblyTool\src\Riskeer.AssemblyTool.Data\Riskeer.AssemblyTool.Data.csproj"/>
-    <ProjectReference Include="..\..\..\AssemblyTool\src\Riskeer.AssemblyTool.KernelWrapper\Riskeer.AssemblyTool.KernelWrapper.csproj"/>
-    <ProjectReference Include="..\..\..\AssemblyTool\test\Riskeer.AssemblyTool.KernelWrapper.TestUtil\Riskeer.AssemblyTool.KernelWrapper.TestUtil.csproj"/>
-    <ProjectReference Include="..\..\src\Riskeer.Common.Data\Riskeer.Common.Data.csproj"/>
-    <ProjectReference Include="..\..\src\Riskeer.Common.Primitives\Riskeer.Common.Primitives.csproj"/>
-    <ProjectReference Include="..\Riskeer.Common.Data.TestUtil\Riskeer.Common.Data.TestUtil.csproj"/>
+    <ProjectReference Include="..\..\..\..\Core\Common\src\Core.Common.Base\Core.Common.Base.csproj" />
+    <ProjectReference Include="..\..\..\..\Core\Common\src\Core.Common.Util\Core.Common.Util.csproj" />
+    <ProjectReference Include="..\..\..\..\Core\Common\test\Core.Common.Data.TestUtil\Core.Common.Data.TestUtil.csproj" />
+    <ProjectReference Include="..\..\..\..\Core\Common\test\Core.Common.TestUtil\Core.Common.TestUtil.csproj" />
+    <ProjectReference Include="..\..\..\AssemblyTool\src\Riskeer.AssemblyTool.Data\Riskeer.AssemblyTool.Data.csproj" />
+    <ProjectReference Include="..\..\..\AssemblyTool\src\Riskeer.AssemblyTool.KernelWrapper\Riskeer.AssemblyTool.KernelWrapper.csproj" />
+    <ProjectReference Include="..\..\..\AssemblyTool\test\Riskeer.AssemblyTool.KernelWrapper.TestUtil\Riskeer.AssemblyTool.KernelWrapper.TestUtil.csproj" />
+    <ProjectReference Include="..\..\src\Riskeer.Common.Data\Riskeer.Common.Data.csproj" />
+    <ProjectReference Include="..\..\src\Riskeer.Common.Primitives\Riskeer.Common.Primitives.csproj" />
+    <ProjectReference Include="..\Riskeer.Common.Data.TestUtil\Riskeer.Common.Data.TestUtil.csproj" />
   </ItemGroup>
   <ItemGroup>
     <None Include="..\..\..\..\build\Copying.licenseheader">
Index: Riskeer/Common/test/Riskeer.Common.Data.Test/Structures/StructuresCalculationScenarioTest.cs
===================================================================
diff -u -r7f3ed17a0e466320f1eacc1d55fd4f99016ae6cf -rc29ddf2e68499841e1d892129d60a42adc4ac134
--- Riskeer/Common/test/Riskeer.Common.Data.Test/Structures/StructuresCalculationScenarioTest.cs	(.../StructuresCalculationScenarioTest.cs)	(revision 7f3ed17a0e466320f1eacc1d55fd4f99016ae6cf)
+++ Riskeer/Common/test/Riskeer.Common.Data.Test/Structures/StructuresCalculationScenarioTest.cs	(.../StructuresCalculationScenarioTest.cs)	(revision c29ddf2e68499841e1d892129d60a42adc4ac134)
@@ -50,13 +50,7 @@
         }
 
         [Test]
-        [SetCulture("nl-NL")]
-        [TestCase(double.NaN)]
-        [TestCase(double.PositiveInfinity)]
-        [TestCase(double.NegativeInfinity)]
-        [TestCase(-0.1)]
-        [TestCase(1.0001)]
-        [TestCase(1.1)]
+        [TestCaseSource(typeof(CalculationScenarioTestHelper), nameof(CalculationScenarioTestHelper.GetInvalidScenarioContributionValues))]
         public void Contribution_SetInvalidValue_ThrowArgumentException(double newValue)
         {
             // Setup
@@ -70,13 +64,8 @@
         }
 
         [Test]
-        [SetCulture("nl-NL")]
-        [TestCase(0.0)]
-        [TestCase(0.00001)]
-        [TestCase(0.0001)]
-        [TestCase(1.0)]
-        [TestCase(1.00001)]
-        public void Contribution_SetValidValue_ValueSetAndSandParticlesVolumicWeightUpdated(double newValue)
+        [TestCaseSource(typeof(CalculationScenarioTestHelper), nameof(CalculationScenarioTestHelper.GetValidScenarioContributionValues))]
+        public void Contribution_SetValidValue_ValueSet(double newValue)
         {
             // Setup
             var calculationScenario = new StructuresCalculationScenario<TestStructuresInput>();
Index: Riskeer/Common/test/Riskeer.Common.Data.TestUtil/CalculationScenarioTestHelper.cs
===================================================================
diff -u
--- Riskeer/Common/test/Riskeer.Common.Data.TestUtil/CalculationScenarioTestHelper.cs	(revision 0)
+++ Riskeer/Common/test/Riskeer.Common.Data.TestUtil/CalculationScenarioTestHelper.cs	(revision c29ddf2e68499841e1d892129d60a42adc4ac134)
@@ -0,0 +1,64 @@
+// Copyright (C) Stichting Deltares 2019. All rights reserved.
+//
+// This file is part of Riskeer.
+//
+// Riskeer is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+// 
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program. If not, see <http://www.gnu.org/licenses/>.
+//
+// All names, logos, and references to "Deltares" are registered trademarks of
+// Stichting Deltares and remain full property of Stichting Deltares at all times.
+// All rights reserved.
+
+using System.Collections.Generic;
+using NUnit.Framework;
+using Riskeer.Common.Data.Calculation;
+
+namespace Riskeer.Common.Data.TestUtil
+{
+    /// <summary>
+    /// Helper class for testing <see cref="ICalculationScenario"/>.
+    /// </summary>
+    public static class CalculationScenarioTestHelper
+    {
+        /// <summary>
+        /// Gets the valid scenario contribution values.
+        /// </summary>
+        /// <returns>A collection of valid scenario contribution values.</returns>
+        public static IEnumerable<TestCaseData> GetValidScenarioContributionValues()
+        {
+            return new[]
+            {
+                new TestCaseData(-0.00001),
+                new TestCaseData(0.0),
+                new TestCaseData(1.0),
+                new TestCaseData(1.00001)
+            };
+        }
+
+        /// <summary>
+        /// Gets the invalid scenario contribution values.
+        /// </summary>
+        /// <returns>A collection of invalid scenario contribution values.</returns>
+        public static IEnumerable<TestCaseData> GetInvalidScenarioContributionValues()
+        {
+            return new[]
+            {
+                new TestCaseData(double.NaN),
+                new TestCaseData(double.PositiveInfinity),
+                new TestCaseData(double.NegativeInfinity),
+                new TestCaseData(-0.0001),
+                new TestCaseData(1.0001)
+            };
+        }
+    }
+}
\ No newline at end of file
Index: Riskeer/GrassCoverErosionInwards/src/Riskeer.GrassCoverErosionInwards.Data/GrassCoverErosionInwardsCalculationScenario.cs
===================================================================
diff -u -r04d505aa8ee5dc153f7e0e1155c7b1c0b39283f5 -rc29ddf2e68499841e1d892129d60a42adc4ac134
--- Riskeer/GrassCoverErosionInwards/src/Riskeer.GrassCoverErosionInwards.Data/GrassCoverErosionInwardsCalculationScenario.cs	(.../GrassCoverErosionInwardsCalculationScenario.cs)	(revision 04d505aa8ee5dc153f7e0e1155c7b1c0b39283f5)
+++ Riskeer/GrassCoverErosionInwards/src/Riskeer.GrassCoverErosionInwards.Data/GrassCoverErosionInwardsCalculationScenario.cs	(.../GrassCoverErosionInwardsCalculationScenario.cs)	(revision c29ddf2e68499841e1d892129d60a42adc4ac134)
@@ -19,10 +19,9 @@
 // Stichting Deltares and remain full property of Stichting Deltares at all times.
 // All rights reserved.
 
-using System;
 using Core.Common.Base.Data;
 using Riskeer.Common.Data.Calculation;
-using RiskeerCommonDataResources = Riskeer.Common.Data.Properties.Resources;
+using Riskeer.Common.Data.Helpers;
 
 namespace Riskeer.GrassCoverErosionInwards.Data
 {
@@ -32,17 +31,14 @@
     public class GrassCoverErosionInwardsCalculationScenario : GrassCoverErosionInwardsCalculation, ICalculationScenario
     {
         private RoundedDouble contribution;
-        private const int contributionNumberOfDecimalPlaces = 4;
-        private static readonly Range<RoundedDouble> contributionValidityRange = new Range<RoundedDouble>(new RoundedDouble(contributionNumberOfDecimalPlaces),
-                                                                                                          new RoundedDouble(contributionNumberOfDecimalPlaces, 1.0));
-        
+
         /// <summary>
         /// Creates a new instance of <see cref="GrassCoverErosionInwardsCalculationScenario"/>.
         /// </summary>
         public GrassCoverErosionInwardsCalculationScenario()
         {
             IsRelevant = true;
-            contribution = new RoundedDouble(4, 1);
+            contribution = new RoundedDouble(CalculationScenarioHelper.ContributionNumberOfDecimalPlaces, 1);
         }
 
         public bool IsRelevant { get; set; }
@@ -52,12 +48,9 @@
             get => contribution;
             set
             {
-                RoundedDouble newValue = value.ToPrecision(contributionNumberOfDecimalPlaces);
+                RoundedDouble newValue = value.ToPrecision(CalculationScenarioHelper.ContributionNumberOfDecimalPlaces);
 
-                if (!contributionValidityRange.InRange(newValue))
-                {
-                    throw new ArgumentOutOfRangeException(null, string.Format(RiskeerCommonDataResources.Contribution_must_be_within_Range_0_and_100));
-                }
+                CalculationScenarioHelper.ValidateScenarioContribution(newValue);
 
                 contribution = newValue;
             }
Index: Riskeer/GrassCoverErosionInwards/test/Riskeer.GrassCoverErosionInwards.Data.Test/GrassCoverErosionInwardsCalculationScenarioTest.cs
===================================================================
diff -u -r04d505aa8ee5dc153f7e0e1155c7b1c0b39283f5 -rc29ddf2e68499841e1d892129d60a42adc4ac134
--- Riskeer/GrassCoverErosionInwards/test/Riskeer.GrassCoverErosionInwards.Data.Test/GrassCoverErosionInwardsCalculationScenarioTest.cs	(.../GrassCoverErosionInwardsCalculationScenarioTest.cs)	(revision 04d505aa8ee5dc153f7e0e1155c7b1c0b39283f5)
+++ Riskeer/GrassCoverErosionInwards/test/Riskeer.GrassCoverErosionInwards.Data.Test/GrassCoverErosionInwardsCalculationScenarioTest.cs	(.../GrassCoverErosionInwardsCalculationScenarioTest.cs)	(revision c29ddf2e68499841e1d892129d60a42adc4ac134)
@@ -49,13 +49,7 @@
         }
 
         [Test]
-        [SetCulture("nl-NL")]
-        [TestCase(double.NaN)]
-        [TestCase(double.PositiveInfinity)]
-        [TestCase(double.NegativeInfinity)]
-        [TestCase(-0.1)]
-        [TestCase(1.0001)]
-        [TestCase(1.1)]
+        [TestCaseSource(typeof(CalculationScenarioTestHelper), nameof(CalculationScenarioTestHelper.GetInvalidScenarioContributionValues))]
         public void Contribution_SetInvalidValue_ThrowArgumentException(double newValue)
         {
             // Setup
@@ -69,13 +63,8 @@
         }
 
         [Test]
-        [SetCulture("nl-NL")]
-        [TestCase(0.0)]
-        [TestCase(0.00001)]
-        [TestCase(0.0001)]
-        [TestCase(1.0)]
-        [TestCase(1.00001)]
-        public void Contribution_SetValidValue_ValueSetAndSandParticlesVolumicWeightUpdated(double newValue)
+        [TestCaseSource(typeof(CalculationScenarioTestHelper), nameof(CalculationScenarioTestHelper.GetValidScenarioContributionValues))]
+        public void Contribution_SetValidValue_ValueSet(double newValue)
         {
             // Setup
             var calculationScenario = new GrassCoverErosionInwardsCalculationScenario();
Index: Riskeer/MacroStabilityInwards/src/Riskeer.MacroStabilityInwards.Data/MacroStabilityInwardsCalculationScenario.cs
===================================================================
diff -u -r7e68d14a3867bef430305c683d7ee0221f99c261 -rc29ddf2e68499841e1d892129d60a42adc4ac134
--- Riskeer/MacroStabilityInwards/src/Riskeer.MacroStabilityInwards.Data/MacroStabilityInwardsCalculationScenario.cs	(.../MacroStabilityInwardsCalculationScenario.cs)	(revision 7e68d14a3867bef430305c683d7ee0221f99c261)
+++ Riskeer/MacroStabilityInwards/src/Riskeer.MacroStabilityInwards.Data/MacroStabilityInwardsCalculationScenario.cs	(.../MacroStabilityInwardsCalculationScenario.cs)	(revision c29ddf2e68499841e1d892129d60a42adc4ac134)
@@ -19,10 +19,9 @@
 // Stichting Deltares and remain full property of Stichting Deltares at all times.
 // All rights reserved.
 
-using System;
 using Core.Common.Base.Data;
 using Riskeer.Common.Data.Calculation;
-using RiskeerCommonDataResources = Riskeer.Common.Data.Properties.Resources;
+using Riskeer.Common.Data.Helpers;
 
 namespace Riskeer.MacroStabilityInwards.Data
 {
@@ -32,9 +31,6 @@
     public class MacroStabilityInwardsCalculationScenario : MacroStabilityInwardsCalculation, ICalculationScenario
     {
         private RoundedDouble contribution;
-        private const int contributionNumberOfDecimalPlaces = 4;
-        private static readonly Range<RoundedDouble> contributionValidityRange = new Range<RoundedDouble>(new RoundedDouble(contributionNumberOfDecimalPlaces),
-                                                                                                          new RoundedDouble(contributionNumberOfDecimalPlaces, 1.0));
 
         /// <summary>
         /// Creates a new instance of <see cref="MacroStabilityInwardsCalculationScenario"/>.
@@ -52,12 +48,9 @@
             get => contribution;
             set
             {
-                RoundedDouble newValue = value.ToPrecision(contributionNumberOfDecimalPlaces);
+                RoundedDouble newValue = value.ToPrecision(CalculationScenarioHelper.ContributionNumberOfDecimalPlaces);
 
-                if (!contributionValidityRange.InRange(newValue))
-                {
-                    throw new ArgumentOutOfRangeException(null, string.Format(RiskeerCommonDataResources.Contribution_must_be_within_Range_0_and_100));
-                }
+                CalculationScenarioHelper.ValidateScenarioContribution(newValue);
 
                 contribution = newValue;
             }
Index: Riskeer/MacroStabilityInwards/test/Riskeer.MacroStabilityInwards.Data.Test/MacroStabilityInwardsCalculationScenarioTest.cs
===================================================================
diff -u -r7e68d14a3867bef430305c683d7ee0221f99c261 -rc29ddf2e68499841e1d892129d60a42adc4ac134
--- Riskeer/MacroStabilityInwards/test/Riskeer.MacroStabilityInwards.Data.Test/MacroStabilityInwardsCalculationScenarioTest.cs	(.../MacroStabilityInwardsCalculationScenarioTest.cs)	(revision 7e68d14a3867bef430305c683d7ee0221f99c261)
+++ Riskeer/MacroStabilityInwards/test/Riskeer.MacroStabilityInwards.Data.Test/MacroStabilityInwardsCalculationScenarioTest.cs	(.../MacroStabilityInwardsCalculationScenarioTest.cs)	(revision c29ddf2e68499841e1d892129d60a42adc4ac134)
@@ -49,13 +49,7 @@
         }
 
         [Test]
-        [SetCulture("nl-NL")]
-        [TestCase(double.NaN)]
-        [TestCase(double.PositiveInfinity)]
-        [TestCase(double.NegativeInfinity)]
-        [TestCase(-0.1)]
-        [TestCase(1.0001)]
-        [TestCase(1.1)]
+        [TestCaseSource(typeof(CalculationScenarioTestHelper), nameof(CalculationScenarioTestHelper.GetInvalidScenarioContributionValues))]
         public void Contribution_SetInvalidValue_ThrowArgumentException(double newValue)
         {
             // Setup
@@ -69,13 +63,8 @@
         }
 
         [Test]
-        [SetCulture("nl-NL")]
-        [TestCase(0.0)]
-        [TestCase(0.00001)]
-        [TestCase(0.0001)]
-        [TestCase(1.0)]
-        [TestCase(1.00001)]
-        public void Contribution_SetValidValue_ValueSetAndSandParticlesVolumicWeightUpdated(double newValue)
+        [TestCaseSource(typeof(CalculationScenarioTestHelper), nameof(CalculationScenarioTestHelper.GetValidScenarioContributionValues))]
+        public void Contribution_SetValidValue_ValueSet(double newValue)
         {
             // Setup
             var calculationScenario = new MacroStabilityInwardsCalculationScenario();
Index: Riskeer/Piping/src/Riskeer.Piping.Data/Probabilistic/ProbabilisticPipingCalculationScenario.cs
===================================================================
diff -u -re2b60a183f95fefe71686ac319c22bb7ad644bca -rc29ddf2e68499841e1d892129d60a42adc4ac134
--- Riskeer/Piping/src/Riskeer.Piping.Data/Probabilistic/ProbabilisticPipingCalculationScenario.cs	(.../ProbabilisticPipingCalculationScenario.cs)	(revision e2b60a183f95fefe71686ac319c22bb7ad644bca)
+++ Riskeer/Piping/src/Riskeer.Piping.Data/Probabilistic/ProbabilisticPipingCalculationScenario.cs	(.../ProbabilisticPipingCalculationScenario.cs)	(revision c29ddf2e68499841e1d892129d60a42adc4ac134)
@@ -20,6 +20,7 @@
 // All rights reserved.
 
 using Core.Common.Base.Data;
+using Riskeer.Common.Data.Helpers;
 
 namespace Riskeer.Piping.Data.Probabilistic
 {
@@ -36,7 +37,7 @@
         public ProbabilisticPipingCalculationScenario()
         {
             IsRelevant = true;
-            contribution = new RoundedDouble(4, 1.0);
+            contribution = new RoundedDouble(CalculationScenarioHelper.ContributionNumberOfDecimalPlaces, 1.0);
         }
 
         public bool IsRelevant { get; set; }
Index: Riskeer/Piping/src/Riskeer.Piping.Data/SemiProbabilistic/SemiProbabilisticPipingCalculationScenario.cs
===================================================================
diff -u -r87a1bea2bd70c4f66957ae4b961e23f2756014ce -rc29ddf2e68499841e1d892129d60a42adc4ac134
--- Riskeer/Piping/src/Riskeer.Piping.Data/SemiProbabilistic/SemiProbabilisticPipingCalculationScenario.cs	(.../SemiProbabilisticPipingCalculationScenario.cs)	(revision 87a1bea2bd70c4f66957ae4b961e23f2756014ce)
+++ Riskeer/Piping/src/Riskeer.Piping.Data/SemiProbabilistic/SemiProbabilisticPipingCalculationScenario.cs	(.../SemiProbabilisticPipingCalculationScenario.cs)	(revision c29ddf2e68499841e1d892129d60a42adc4ac134)
@@ -19,9 +19,8 @@
 // Stichting Deltares and remain full property of Stichting Deltares at all times.
 // All rights reserved.
 
-using System;
 using Core.Common.Base.Data;
-using RiskeerCommonDataResources = Riskeer.Common.Data.Properties.Resources;
+using Riskeer.Common.Data.Helpers;
 
 namespace Riskeer.Piping.Data.SemiProbabilistic
 {
@@ -30,9 +29,6 @@
     /// </summary>
     public class SemiProbabilisticPipingCalculationScenario : SemiProbabilisticPipingCalculation, IPipingCalculationScenario<SemiProbabilisticPipingInput>
     {
-        private const int contributionNumberOfDecimalPlaces = 4;
-        private static readonly Range<RoundedDouble> contributionValidityRange = new Range<RoundedDouble>(new RoundedDouble(contributionNumberOfDecimalPlaces),
-                                                                                                          new RoundedDouble(contributionNumberOfDecimalPlaces, 1.0));
         private RoundedDouble contribution;
 
         /// <summary>
@@ -41,7 +37,7 @@
         public SemiProbabilisticPipingCalculationScenario()
         {
             IsRelevant = true;
-            contribution = new RoundedDouble(4, 1.0);
+            contribution = new RoundedDouble(CalculationScenarioHelper.ContributionNumberOfDecimalPlaces, 1.0);
         }
 
         public bool IsRelevant { get; set; }
@@ -51,12 +47,9 @@
             get => contribution;
             set
             {
-                RoundedDouble newValue = value.ToPrecision(contributionNumberOfDecimalPlaces);
+                RoundedDouble newValue = value.ToPrecision(CalculationScenarioHelper.ContributionNumberOfDecimalPlaces);
 
-                if (!contributionValidityRange.InRange(newValue))
-                {
-                    throw new ArgumentOutOfRangeException(null, string.Format(RiskeerCommonDataResources.Contribution_must_be_within_Range_0_and_100));
-                }
+                CalculationScenarioHelper.ValidateScenarioContribution(newValue);
 
                 contribution = newValue;
             }
Index: Riskeer/Piping/test/Riskeer.Piping.Data.Test/SemiProbabilistic/SemiProbabilisticPipingCalculationScenarioTest.cs
===================================================================
diff -u -r70e032bb8b84bfd974f2fc1da804978fd9bae5c5 -rc29ddf2e68499841e1d892129d60a42adc4ac134
--- Riskeer/Piping/test/Riskeer.Piping.Data.Test/SemiProbabilistic/SemiProbabilisticPipingCalculationScenarioTest.cs	(.../SemiProbabilisticPipingCalculationScenarioTest.cs)	(revision 70e032bb8b84bfd974f2fc1da804978fd9bae5c5)
+++ Riskeer/Piping/test/Riskeer.Piping.Data.Test/SemiProbabilistic/SemiProbabilisticPipingCalculationScenarioTest.cs	(.../SemiProbabilisticPipingCalculationScenarioTest.cs)	(revision c29ddf2e68499841e1d892129d60a42adc4ac134)
@@ -49,13 +49,7 @@
         }
 
         [Test]
-        [SetCulture("nl-NL")]
-        [TestCase(double.NaN)]
-        [TestCase(double.PositiveInfinity)]
-        [TestCase(double.NegativeInfinity)]
-        [TestCase(-0.1)]
-        [TestCase(1.0001)]
-        [TestCase(1.1)]
+        [TestCaseSource(typeof(CalculationScenarioTestHelper), nameof(CalculationScenarioTestHelper.GetInvalidScenarioContributionValues))]
         public void Contribution_SetInvalidValue_ThrowArgumentException(double newValue)
         {
             // Setup
@@ -69,13 +63,8 @@
         }
 
         [Test]
-        [SetCulture("nl-NL")]
-        [TestCase(0.0)]
-        [TestCase(0.00001)]
-        [TestCase(0.0001)]
-        [TestCase(1.0)]
-        [TestCase(1.00001)]
-        public void Contribution_SetValidValue_ValueSetAndSandParticlesVolumicWeightUpdated(double newValue)
+        [TestCaseSource(typeof(CalculationScenarioTestHelper), nameof(CalculationScenarioTestHelper.GetValidScenarioContributionValues))]
+        public void Contribution_SetValidValue_ValueSet(double newValue)
         {
             // Setup
             var calculationScenario = new SemiProbabilisticPipingCalculationScenario();