Index: Ringtoets/StabilityPointStructures/src/Ringtoets.StabilityPointStructures.Service/StabilityPointStructuresCalculationActivity.cs
===================================================================
diff -u -r6ac5917aa7fd76c41f389c1f649b2449229925d8 -ra38c4e8a74a2110b70335a61abe451051f70528a
--- Ringtoets/StabilityPointStructures/src/Ringtoets.StabilityPointStructures.Service/StabilityPointStructuresCalculationActivity.cs	(.../StabilityPointStructuresCalculationActivity.cs)	(revision 6ac5917aa7fd76c41f389c1f649b2449229925d8)
+++ Ringtoets/StabilityPointStructures/src/Ringtoets.StabilityPointStructures.Service/StabilityPointStructuresCalculationActivity.cs	(.../StabilityPointStructuresCalculationActivity.cs)	(revision a38c4e8a74a2110b70335a61abe451051f70528a)
@@ -79,19 +79,29 @@
             calculationService = new StabilityPointStructuresCalculationService();
         }
 
-        protected override void OnCancel()
+        protected override bool Validate()
         {
-            
+            return StabilityPointStructuresCalculationService.Validate(calculation, assessmentSection);
         }
 
-        protected override void OnFinish()
+        protected override void PerformCalculation()
         {
-            throw new NotImplementedException();
+            calculation.ClearOutput();
+
+            calculationService.Calculate(calculation,
+                                         assessmentSection,
+                                         failureMechanism,
+                                         hlcdFilepath);
         }
 
-        protected override void PerformCalculation()
+        protected override void OnCancel()
         {
-            throw new NotImplementedException();
+            calculationService.Cancel();
         }
+
+        protected override void OnFinish()
+        {
+            calculation.NotifyObservers();
+        }
     }
 }
\ No newline at end of file