hello,

I have question about shop order Receipt. currently we setup  part Inventory valuation method:  Weighted Average. After Receipt of Shop Order sometime it generate both Negative Difference of Calculation and Positive Difference of Calculation. sometime it only generate Negative Difference of Calculation or Positive Difference of Calculation. I want to know what’s situation it will generate  Difference of Calculation?  as I checked if WIP still have value on WIP or between WIP and Inventory have variance it will generate Difference of Calculation. does any one can give me a favor for explain the fully work principle about this?