Double calculation in MRP

Hi all,

Could you please clarify me why MRP calculates double in MRP? I use JDE Edward 8.10

I expect that the system will subtract only one Demand either Forecast or SO.

If this is a bug or problem with the setting.

Thank you.

In Time Series, (see full table in attachment)

                              On 12/12/2016                 *12/16/2016             

+ BA                                  544                            304

- FCST                             240                   

- SO                                                                     240

= EA                                 304                               64

Our FCST is from Demand Schedule 830 and SO is from 862 daily plan.

In the Demand Supply MRP also show double calculate

Promise Date           Demand        Supply    Q Available

12/7/2016                                       544            544

12/12/2016                204              304            304         Forecast Demand DS

12/16/2016                204                                  64          Sale Order

The MFG Data is setup as

Order Policy Code  = 4

Value Order Policy = 9