diff --git a/VectoCommon/VectoCommon/InputData/DeclarationInputData.cs b/VectoCommon/VectoCommon/InputData/DeclarationInputData.cs
index be9a99da7911397b77266043c27c6005a79d1842..fa49368553cfb224edd1336fdb7bb926b5fff4d2 100644
--- a/VectoCommon/VectoCommon/InputData/DeclarationInputData.cs
+++ b/VectoCommon/VectoCommon/InputData/DeclarationInputData.cs
@@ -927,9 +927,15 @@ namespace TUGraz.VectoCommon.InputData
 		DateTime Date { get; }
 	}
 
+	public interface IManufacturingStageInputData : IVehicleDeclarationInputData
+	{
+		int StageCount { get; }
+
+		DigestData HashPreviousStage { get; }
+	}
+
 	public enum StateOfCompletion
 	{
-		unknown,
 		incomplete,
 		complete,
 		completed