Index: Riskeer/Integration/src/Riskeer.Integration.Plugin/Handlers/HydraulicBoundaryLocationCalculationsForTargetProbabilityChangeHandler.cs
===================================================================
diff -u
--- Riskeer/Integration/src/Riskeer.Integration.Plugin/Handlers/HydraulicBoundaryLocationCalculationsForTargetProbabilityChangeHandler.cs	(revision 0)
+++ Riskeer/Integration/src/Riskeer.Integration.Plugin/Handlers/HydraulicBoundaryLocationCalculationsForTargetProbabilityChangeHandler.cs	(revision 7e097df29e12ff33d862f07ca7ec9cb5864ae608)
@@ -0,0 +1,100 @@
+// Copyright (C) Stichting Deltares 2021. 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 System.Collections.Generic;
+using System.Linq;
+using System.Windows.Forms;
+using Core.Common.Base;
+using log4net;
+using Riskeer.Common.Data.Hydraulics;
+using Riskeer.Common.Forms.PropertyClasses;
+using Riskeer.Integration.Plugin.Properties;
+using CoreCommonBaseResources = Core.Common.Base.Properties.Resources;
+
+namespace Riskeer.Integration.Plugin.Handlers
+{
+    /// <summary>
+    /// Class responsible for changing the <see cref="HydraulicBoundaryLocationCalculationsForTargetProbability.TargetProbability"/>
+    /// value of a <see cref="HydraulicBoundaryLocationCalculationsForTargetProbability"/> and clearing all dependent data.
+    /// </summary>
+    public class HydraulicBoundaryLocationCalculationsForTargetProbabilityChangeHandler : IObservablePropertyChangeHandler
+    {
+        private readonly HydraulicBoundaryLocationCalculationsForTargetProbability calculationsForTargetProbability;
+        private readonly ILog log = LogManager.GetLogger(typeof(HydraulicBoundaryLocationCalculationsForTargetProbabilityChangeHandler));
+
+        /// <summary>
+        /// Creates a new instance of <see cref="HydraulicBoundaryLocationCalculationsForTargetProbabilityChangeHandler"/>.
+        /// </summary>
+        /// <param name="calculationsForTargetProbability">The calculations to change the target probability for.</param>
+        /// <exception cref="ArgumentNullException">Thrown when <paramref name="calculationsForTargetProbability"/> is <c>null</c>.</exception>
+        public HydraulicBoundaryLocationCalculationsForTargetProbabilityChangeHandler(HydraulicBoundaryLocationCalculationsForTargetProbability calculationsForTargetProbability)
+        {
+            if (calculationsForTargetProbability == null)
+            {
+                throw new ArgumentNullException(nameof(calculationsForTargetProbability));
+            }
+
+            this.calculationsForTargetProbability = calculationsForTargetProbability;
+        }
+
+        public IEnumerable<IObservable> SetPropertyValueAfterConfirmation(SetObservablePropertyValueDelegate setValue)
+        {
+            if (setValue == null)
+            {
+                throw new ArgumentNullException(nameof(setValue));
+            }
+
+            var affectedObjects = new List<IObservable>();
+
+            if (ConfirmPropertyChange())
+            {
+                setValue();
+
+                affectedObjects.AddRange(ClearHydraulicBoundaryLocationCalculationOutput());
+            }
+
+            return affectedObjects;
+        }
+
+        private static bool ConfirmPropertyChange()
+        {
+            DialogResult result = MessageBox.Show(Resources.HydraulicBoundaryLocationCalculationsForTargetProbabilityChangeHandler_Confirm_change_target_probability_and_clear_dependent_data,
+                                                  CoreCommonBaseResources.Confirm,
+                                                  MessageBoxButtons.OKCancel);
+            return result == DialogResult.OK;
+        }
+
+        private IEnumerable<IObservable> ClearHydraulicBoundaryLocationCalculationOutput()
+        {
+            IEnumerable<IObservable> affectedObjects = new List<IObservable>(); // Fixme
+
+            if (affectedObjects.Any())
+            {
+                log.Info(Resources.FailureMechanismContributionNormChangeHandler_Waveheight_and_design_water_level_results_cleared);
+
+                return affectedObjects;
+            }
+
+            return Enumerable.Empty<IObservable>();
+        }
+    }
+}
\ No newline at end of file
Index: Riskeer/Integration/src/Riskeer.Integration.Plugin/Properties/Resources.Designer.cs
===================================================================
diff -u -r119d7f9ec28459422a25a3aa96034cb7c7c303ac -r7e097df29e12ff33d862f07ca7ec9cb5864ae608
--- Riskeer/Integration/src/Riskeer.Integration.Plugin/Properties/Resources.Designer.cs	(.../Resources.Designer.cs)	(revision 119d7f9ec28459422a25a3aa96034cb7c7c303ac)
+++ Riskeer/Integration/src/Riskeer.Integration.Plugin/Properties/Resources.Designer.cs	(.../Resources.Designer.cs)	(revision 7e097df29e12ff33d862f07ca7ec9cb5864ae608)
@@ -419,6 +419,18 @@
         }
         
         /// <summary>
+        ///   Looks up a localized string similar to Als u de doelkans aanpast, dan worden alle bijbehorende rekenresultaten verwijderd.
+        ///
+        ///Weet u zeker dat u wilt doorgaan?.
+        /// </summary>
+        public static string HydraulicBoundaryLocationCalculationsForTargetProbabilityChangeHandler_Confirm_change_target_probability_and_clear_dependent_data {
+            get {
+                return ResourceManager.GetString("HydraulicBoundaryLocationCalculationsForTargetProbabilityChangeHandler_Confirm_ch" +
+                        "ange_target_probability_and_clear_dependent_data", resourceCulture);
+            }
+        }
+        
+        /// <summary>
         ///   Looks up a localized string similar to Importeren van het HLCD bestand.
         /// </summary>
         public static string HydraulicLocationConfigurationDatabaseImportHandler_ImportHydraulicLocationConfigurationSettings_Description {
Index: Riskeer/Integration/src/Riskeer.Integration.Plugin/Properties/Resources.resx
===================================================================
diff -u -r119d7f9ec28459422a25a3aa96034cb7c7c303ac -r7e097df29e12ff33d862f07ca7ec9cb5864ae608
--- Riskeer/Integration/src/Riskeer.Integration.Plugin/Properties/Resources.resx	(.../Resources.resx)	(revision 119d7f9ec28459422a25a3aa96034cb7c7c303ac)
+++ Riskeer/Integration/src/Riskeer.Integration.Plugin/Properties/Resources.resx	(.../Resources.resx)	(revision 7e097df29e12ff33d862f07ca7ec9cb5864ae608)
@@ -271,4 +271,9 @@
   <data name="ContextMenuStrip_Add_TargetProbability_WaveHeights_ToolTip" xml:space="preserve">
     <value>Voeg een nieuwe doelkans toe aan deze map met golfhoogten.</value>
   </data>
+  <data name="HydraulicBoundaryLocationCalculationsForTargetProbabilityChangeHandler_Confirm_change_target_probability_and_clear_dependent_data" xml:space="preserve">
+    <value>Als u de doelkans aanpast, dan worden alle bijbehorende rekenresultaten verwijderd.
+
+Weet u zeker dat u wilt doorgaan?</value>
+  </data>
 </root>
\ No newline at end of file