Index: Ringtoets/Common/src/Ringtoets.Common.Service/DesignWaterLevelCalculationActivity.cs
===================================================================
diff -u -r1042a38d3663daeda5a8e1083edbc63a4b6aae94 -rc8743a6562e3e5581138be398f405b7f6b7c8976
--- Ringtoets/Common/src/Ringtoets.Common.Service/DesignWaterLevelCalculationActivity.cs	(.../DesignWaterLevelCalculationActivity.cs)	(revision 1042a38d3663daeda5a8e1083edbc63a4b6aae94)
+++ Ringtoets/Common/src/Ringtoets.Common.Service/DesignWaterLevelCalculationActivity.cs	(.../DesignWaterLevelCalculationActivity.cs)	(revision c8743a6562e3e5581138be398f405b7f6b7c8976)
@@ -83,7 +83,8 @@
             }
 
             PerformRun(() => DesignWaterLevelCalculationService.Instance.Validate(
-                messageProvider.GetCalculationName(hydraulicBoundaryLocation.Name), hydraulicBoundaryDatabaseFilePath),
+                messageProvider.GetCalculationName(hydraulicBoundaryLocation.Name), 
+                hydraulicBoundaryDatabaseFilePath),
                        () => RingtoetsCommonDataSynchronizationService.ClearDesignWaterLevel(hydraulicBoundaryLocation),
                        () => DesignWaterLevelCalculationService.Instance.Calculate(hydraulicBoundaryLocation,
                                                                                    hydraulicBoundaryDatabaseFilePath,
@@ -97,8 +98,7 @@
             PerformFinish(() =>
             {
                 hydraulicBoundaryLocation.DesignWaterLevel = (RoundedDouble) Output.Result;
-                bool designWaterLevelCalculationConvergence =
-                    Math.Abs(Output.CalculatedReliabilityIndex - StatisticsConverter.NormToBeta(norm)) <= 1.0e-3;
+                bool designWaterLevelCalculationConvergence = RingtoetsCommonDataSynchronizationService.CalculationConverged(Output, norm);
                 if (!designWaterLevelCalculationConvergence)
                 {
                     log.Warn(messageProvider.GetCalculatedNotConvergedMessage(hydraulicBoundaryLocation.Name));