Index: Ringtoets/Piping/src/Ringtoets.Piping.Data/SoilProfile/PipingStochasticSoilProfile.cs
===================================================================
diff -u -ref905ca4d14236014d884b5658e18838b697eb01 -r6545e28fb366f9bfdf71e776a404e9ce256df182
--- Ringtoets/Piping/src/Ringtoets.Piping.Data/SoilProfile/PipingStochasticSoilProfile.cs	(.../PipingStochasticSoilProfile.cs)	(revision ef905ca4d14236014d884b5658e18838b697eb01)
+++ Ringtoets/Piping/src/Ringtoets.Piping.Data/SoilProfile/PipingStochasticSoilProfile.cs	(.../PipingStochasticSoilProfile.cs)	(revision 6545e28fb366f9bfdf71e776a404e9ce256df182)
@@ -98,6 +98,19 @@
             Probability = fromProfile.Probability;
         }
 
+        /// <summary>
+        /// Updates the probability of the <see cref="PipingStochasticSoilProfile"/> 
+        /// by adding <paramref name="probabilityToAdd"/>.
+        /// </summary>
+        /// <param name="probabilityToAdd">The amount to increase the <see cref="Probability"/>
+        /// with.</param>
+        /// <exception cref="ArgumentOutOfRangeException">Thrown when the <paramref name="probabilityToAdd"/>
+        /// is outside the range [0, 1].</exception>
+        public void AddProbability(double probabilityToAdd)
+        {
+            Probability += probabilityToAdd;
+        }
+
         public override string ToString()
         {
             return SoilProfile.ToString();