Index: Riskeer/GrassCoverErosionInwards/src/Riskeer.GrassCoverErosionInwards.Data/GrassCoverErosionInwardsCalculation.cs
===================================================================
diff -u -r4cb44d36bec6a6f1b4c1c2ff2db086b9996a2b42 -r5294cbf38ddf4c3fdd7c37b78f1ab4fa89ad9b86
--- Riskeer/GrassCoverErosionInwards/src/Riskeer.GrassCoverErosionInwards.Data/GrassCoverErosionInwardsCalculation.cs	(.../GrassCoverErosionInwardsCalculation.cs)	(revision 4cb44d36bec6a6f1b4c1c2ff2db086b9996a2b42)
+++ Riskeer/GrassCoverErosionInwards/src/Riskeer.GrassCoverErosionInwards.Data/GrassCoverErosionInwardsCalculation.cs	(.../GrassCoverErosionInwardsCalculation.cs)	(revision 5294cbf38ddf4c3fdd7c37b78f1ab4fa89ad9b86)
@@ -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;
 using Riskeer.Common.Data.Calculation;
@@ -35,6 +36,8 @@
         /// Creates a new instance of <see cref="GrassCoverErosionInwardsCalculation"/>.
         /// </summary>
         /// <param name="norm">The norm to use in the calculation input.</param>
+        /// <exception cref="ArgumentOutOfRangeException">Thrown when <paramref name="norm"/>
+        /// is not in the interval {0.0, 0.1] or is <see cref="double.NaN"/>.</exception>
         public GrassCoverErosionInwardsCalculation(double norm)
         {
             Name = RiskeerCommonDataResources.Calculation_DefaultName;
Index: Riskeer/GrassCoverErosionInwards/src/Riskeer.GrassCoverErosionInwards.Data/GrassCoverErosionInwardsCalculationScenario.cs
===================================================================
diff -u -r4cb44d36bec6a6f1b4c1c2ff2db086b9996a2b42 -r5294cbf38ddf4c3fdd7c37b78f1ab4fa89ad9b86
--- Riskeer/GrassCoverErosionInwards/src/Riskeer.GrassCoverErosionInwards.Data/GrassCoverErosionInwardsCalculationScenario.cs	(.../GrassCoverErosionInwardsCalculationScenario.cs)	(revision 4cb44d36bec6a6f1b4c1c2ff2db086b9996a2b42)
+++ Riskeer/GrassCoverErosionInwards/src/Riskeer.GrassCoverErosionInwards.Data/GrassCoverErosionInwardsCalculationScenario.cs	(.../GrassCoverErosionInwardsCalculationScenario.cs)	(revision 5294cbf38ddf4c3fdd7c37b78f1ab4fa89ad9b86)
@@ -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;
 using Riskeer.Common.Data.Calculation;
 using Riskeer.Common.Data.Helpers;
@@ -36,6 +37,8 @@
         /// Creates a new instance of <see cref="GrassCoverErosionInwardsCalculationScenario"/>.
         /// </summary>
         /// <param name="norm">The norm to use in the calculation input.</param>
+        /// <exception cref="ArgumentOutOfRangeException">Thrown when <paramref name="norm"/>
+        /// is not in the interval {0.0, 0.1] or is <see cref="double.NaN"/>.</exception>
         public GrassCoverErosionInwardsCalculationScenario(double norm) 
             : base(norm)
         {
Index: Riskeer/GrassCoverErosionInwards/src/Riskeer.GrassCoverErosionInwards.Data/GrassCoverErosionInwardsInput.cs
===================================================================
diff -u -r4cb44d36bec6a6f1b4c1c2ff2db086b9996a2b42 -r5294cbf38ddf4c3fdd7c37b78f1ab4fa89ad9b86
--- Riskeer/GrassCoverErosionInwards/src/Riskeer.GrassCoverErosionInwards.Data/GrassCoverErosionInwardsInput.cs	(.../GrassCoverErosionInwardsInput.cs)	(revision 4cb44d36bec6a6f1b4c1c2ff2db086b9996a2b42)
+++ Riskeer/GrassCoverErosionInwards/src/Riskeer.GrassCoverErosionInwards.Data/GrassCoverErosionInwardsInput.cs	(.../GrassCoverErosionInwardsInput.cs)	(revision 5294cbf38ddf4c3fdd7c37b78f1ab4fa89ad9b86)
@@ -29,6 +29,7 @@
 using Riskeer.Common.Data.DikeProfiles;
 using Riskeer.Common.Data.Hydraulics;
 using Riskeer.Common.Data.Probabilistics;
+using Riskeer.GrassCoverErosionInwards.Data.Properties;
 using RiskeerCommonDataResources = Riskeer.Common.Data.Properties.Resources;
 
 namespace Riskeer.GrassCoverErosionInwards.Data
@@ -40,18 +41,23 @@
     {
         private const int orientationNumberOfDecimals = 2;
 
-        private static readonly Range<RoundedDouble> orientationValidityRange = new Range<RoundedDouble>(new RoundedDouble(orientationNumberOfDecimals),
-                                                                                                         new RoundedDouble(orientationNumberOfDecimals, 360));
+        private static readonly Range<RoundedDouble> orientationValidityRange = new Range<RoundedDouble>(
+            new RoundedDouble(orientationNumberOfDecimals),
+            new RoundedDouble(orientationNumberOfDecimals, 360));
 
         private LogNormalDistribution criticalFlowRate;
         private RoundedDouble orientation;
         private RoundedDouble dikeHeight;
         private DikeProfile dikeProfile;
+        private double dikeHeightReliabilityIndex;
+        private double overtoppingRateReliabilityIndex;
 
         /// <summary>
         /// Creates a new instance of <see cref="GrassCoverErosionInwardsInput"/>.
         /// </summary>
         /// <param name="norm">The norm to use.</param>
+        /// <exception cref="ArgumentOutOfRangeException">Thrown when <paramref name="norm"/>
+        /// is not in the interval {0.0, 0.1] or is <see cref="double.NaN"/>.</exception>
         public GrassCoverErosionInwardsInput(double norm)
         {
             orientation = new RoundedDouble(orientationNumberOfDecimals);
@@ -76,10 +82,7 @@
         /// </summary>
         public DikeProfile DikeProfile
         {
-            get
-            {
-                return dikeProfile;
-            }
+            get => dikeProfile;
             set
             {
                 dikeProfile = value;
@@ -91,12 +94,11 @@
         /// Gets or sets the orientation of the dike profile geometry with respect to North
         /// in degrees. A positive value equals a clockwise rotation.
         /// </summary>
+        /// <exception cref="ArgumentOutOfRangeException">Thrown when the new value
+        /// is not in the interval [0.00, 360.00] or is <see cref="double.NaN"/>.</exception>
         public RoundedDouble Orientation
         {
-            get
-            {
-                return orientation;
-            }
+            get => orientation;
             set
             {
                 RoundedDouble newOrientation = value.ToPrecision(orientation.NumberOfDecimalPlaces);
@@ -119,38 +121,23 @@
         /// and the succeeding <see cref="RoughnessPoint"/>. The roughness of the last
         /// point is irrelevant.
         /// </remarks>
-        public IEnumerable<RoughnessPoint> DikeGeometry
-        {
-            get
-            {
-                return dikeProfile?.DikeGeometry ?? new RoughnessPoint[0];
-            }
-        }
+        public IEnumerable<RoughnessPoint> DikeGeometry => dikeProfile?.DikeGeometry ?? new RoughnessPoint[0];
 
         /// <summary>
         /// Gets or sets the height of the dike [m+NAP].
         /// </summary>
         public RoundedDouble DikeHeight
         {
-            get
-            {
-                return dikeHeight;
-            }
-            set
-            {
-                dikeHeight = value.ToPrecision(dikeHeight.NumberOfDecimalPlaces);
-            }
+            get => dikeHeight;
+            set => dikeHeight = value.ToPrecision(dikeHeight.NumberOfDecimalPlaces);
         }
 
         /// <summary>
         /// Gets or sets the critical flow rate.
         /// </summary>
         public LogNormalDistribution CriticalFlowRate
         {
-            get
-            {
-                return criticalFlowRate;
-            }
+            get => criticalFlowRate;
             set
             {
                 criticalFlowRate.Mean = value.Mean;
@@ -171,12 +158,32 @@
         /// <summary>
         /// Gets or sets the reliability index for the Dike Height calculation.
         /// </summary>
-        public double DikeHeightReliabilityIndex { get; set; }
+        /// <exception cref="ArgumentOutOfRangeException">Thrown when the new value
+        /// is not in the interval {0.0, 0.1] or is <see cref="double.NaN"/>.</exception>
+        public double DikeHeightReliabilityIndex
+        {
+            get => dikeHeightReliabilityIndex;
+            set
+            {
+                ValidateReliabilityIndex(value);
+                dikeHeightReliabilityIndex = value;
+            }
+        }
 
         /// <summary>
         /// Gets or sets the reliability index for the Overtopping Rate calculation.
         /// </summary>
-        public double OvertoppingRateReliabilityIndex { get; set; }
+        /// <exception cref="ArgumentOutOfRangeException">Thrown when the new value
+        /// is not in the interval {0.0, 0.1] or is <see cref="double.NaN"/>.</exception>
+        public double OvertoppingRateReliabilityIndex
+        {
+            get => overtoppingRateReliabilityIndex;
+            set
+            {
+                ValidateReliabilityIndex(value);
+                overtoppingRateReliabilityIndex = value;
+            }
+        }
 
         /// <summary>
         /// Gets or sets how the Dike Height should be calculated.
@@ -239,15 +246,10 @@
 
         public bool UseForeshore { get; set; }
 
-        public RoundedPoint2DCollection ForeshoreGeometry
-        {
-            get
-            {
-                return dikeProfile != null
-                           ? dikeProfile.ForeshoreGeometry
-                           : new RoundedPoint2DCollection(2, Enumerable.Empty<Point2D>());
-            }
-        }
+        public RoundedPoint2DCollection ForeshoreGeometry =>
+            dikeProfile != null
+                ? dikeProfile.ForeshoreGeometry
+                : new RoundedPoint2DCollection(2, Enumerable.Empty<Point2D>());
 
         /// <summary>
         /// Applies the properties of the <see cref="DikeProfile"/> to the
@@ -282,6 +284,16 @@
             return clone;
         }
 
+        private static void ValidateReliabilityIndex(double reliabilityIndex)
+        {
+            if (double.IsNaN(reliabilityIndex) || reliabilityIndex <= 0 || reliabilityIndex > 0.1)
+            {
+                throw new ArgumentOutOfRangeException(nameof(reliabilityIndex),
+                                                      reliabilityIndex,
+                                                      Resources.ReliabilityIndex_Value_must_be_in_range);
+            }
+        }
+
         private void SetDefaultDikeProfileProperties()
         {
             Orientation = RoundedDouble.NaN;
Index: Riskeer/GrassCoverErosionInwards/src/Riskeer.GrassCoverErosionInwards.Data/Properties/Resources.Designer.cs
===================================================================
diff -u -ra4e3b2745a48598260107bb5bfca7485205cdcc2 -r5294cbf38ddf4c3fdd7c37b78f1ab4fa89ad9b86
--- Riskeer/GrassCoverErosionInwards/src/Riskeer.GrassCoverErosionInwards.Data/Properties/Resources.Designer.cs	(.../Resources.Designer.cs)	(revision a4e3b2745a48598260107bb5bfca7485205cdcc2)
+++ Riskeer/GrassCoverErosionInwards/src/Riskeer.GrassCoverErosionInwards.Data/Properties/Resources.Designer.cs	(.../Resources.Designer.cs)	(revision 5294cbf38ddf4c3fdd7c37b78f1ab4fa89ad9b86)
@@ -1,4 +1,4 @@
-// Copyright (C) Stichting Deltares 2021. All rights reserved.
+// Copyright (C) Stichting Deltares 2021. All rights reserved.
 //
 // This file is part of Riskeer.
 //
@@ -154,5 +154,14 @@
                 return ResourceManager.GetString("OvertoppingRateCalculationType_NoCalculation_DisplayName", resourceCulture);
             }
         }
+        
+        /// <summary>
+        ///   Looks up a localized string similar to De waarde van de doelkans moet groter zijn dan 0.0 en kleiner dan of gelijk aan 0.1..
+        /// </summary>
+        public static string ReliabilityIndex_Value_must_be_in_range {
+            get {
+                return ResourceManager.GetString("ReliabilityIndex_Value_must_be_in_range", resourceCulture);
+            }
+        }
     }
 }
Index: Riskeer/GrassCoverErosionInwards/src/Riskeer.GrassCoverErosionInwards.Data/Properties/Resources.resx
===================================================================
diff -u -rbf1fde9d2147a6eeaecebbb371be2c4856759159 -r5294cbf38ddf4c3fdd7c37b78f1ab4fa89ad9b86
--- Riskeer/GrassCoverErosionInwards/src/Riskeer.GrassCoverErosionInwards.Data/Properties/Resources.resx	(.../Resources.resx)	(revision bf1fde9d2147a6eeaecebbb371be2c4856759159)
+++ Riskeer/GrassCoverErosionInwards/src/Riskeer.GrassCoverErosionInwards.Data/Properties/Resources.resx	(.../Resources.resx)	(revision 5294cbf38ddf4c3fdd7c37b78f1ab4fa89ad9b86)
@@ -141,4 +141,7 @@
   <data name="OvertoppingRateCalculationType_NoCalculation_DisplayName" xml:space="preserve">
     <value>Niet</value>
   </data>
+  <data name="ReliabilityIndex_Value_must_be_in_range" xml:space="preserve">
+    <value>De waarde van de doelkans moet groter zijn dan 0.0 en kleiner dan of gelijk aan 0.1.</value>
+  </data>
 </root>
\ No newline at end of file