diff --git a/ReportImp/BeWoDarmstadt/Calculations/CustomGroupDurationCalculator.cs b/ReportImp/BeWoDarmstadt/Calculations/CustomGroupDurationCalculator.cs
new file mode 100644
index 000000000..8341ffc17
--- /dev/null
+++ b/ReportImp/BeWoDarmstadt/Calculations/CustomGroupDurationCalculator.cs
@@ -0,0 +1,38 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using BeWo.Service.Plugins;
+using BS.Shared.DataContracts;
+
+namespace BeWoDarmstadt.Calculation
+{
+    
+    public class CustomGroupDurationCalculator : GroupDurationCalculator
+    {
+        //public override GroupDurationDC CalculateGroupDuration(int personCount, int employeeCount, decimal totalDuration)
+        //{
+        //    if (personCount > 2)
+        //    {
+        //        var SingleDurationAll = ((totalDuration * employeeCount) / personCount);
+        //        if (SingleDurationAll > 20)
+        //        {
+        //            return new GroupDurationDC()
+        //            {
+        //                SingleDuration = 20,
+        //                TotalDuration = totalDuration
+        //            };
+        //        }
+        //        else
+        //        {
+        //            return new GroupDurationDC()
+        //            {
+        //                SingleDuration = ((totalDuration * employeeCount) / personCount),
+        //                TotalDuration = totalDuration
+        //            };
+        //        }
+        //    }
+        //    return null;
+        //}
+    }
+}