Requirement date in reservation for Stock transfer from one storage locatio

Hi ALL,

I have activated the resevration creation by MRP for stock transfer from mail ware house to service storage location by creating MRP area for service storage location when there is requiremnt from service and when MRP is run on the MRP area the resevration in created and trasnfer order is created .but the requiremnt date in reservation is not the same asd of on service order.so kindly let me know why it is ahppening.