Index: Ringtoets/MacroStabilityInwards/src/Ringtoets.MacroStabilityInwards.Data/MacroStabilityInwardsCalculation.cs
===================================================================
diff -u -r6df492af2166d167f1a154b7997c85a4118b1759 -r73fa8b14820af5ffd04e2e428a32c95426c36553
--- Ringtoets/MacroStabilityInwards/src/Ringtoets.MacroStabilityInwards.Data/MacroStabilityInwardsCalculation.cs	(.../MacroStabilityInwardsCalculation.cs)	(revision 6df492af2166d167f1a154b7997c85a4118b1759)
+++ Ringtoets/MacroStabilityInwards/src/Ringtoets.MacroStabilityInwards.Data/MacroStabilityInwardsCalculation.cs	(.../MacroStabilityInwardsCalculation.cs)	(revision 73fa8b14820af5ffd04e2e428a32c95426c36553)
@@ -53,6 +53,14 @@
 
         public string Name { get; set; }
 
+        public bool ShouldCalculate
+        {
+            get
+            {
+                return !HasOutput;
+            }
+        }
+
         public bool HasOutput
         {
             get