public IWS_SP_GetProductionStatisticsByDateAndShiftResult GetStatisticByDateAndShiftNum(DateTime shift, int shiftNum)
 {
     MESDataContext db = new MESDataContext();
     var statisticModel = db.IWS_SP_GetProductionStatisticsByDateAndShift(shift, shiftNum).FirstOrDefault();
     return statisticModel;
 }