Dogboy 49,
thanks for your input.
I understand your point and i agree with the same when considering only sales orders and stock transport orders.
But let me clarify the scenario that concerned my clients, which is related to having both production and sales (spare parts) requirements on the same PN/MRP AREA/STORAGE LOCATION.
There's a production order reservation for 1 pcs on sloc XXXX, created on 1.1.2016, with req date = 15.1.2016
In order to cover this requirement, MRP has created a proposal with delivery date = 15.1.2016.
The proposal has been converted into a purchase order , maintaining the same delivery date.
As the production order Availability Scope of Check only considers the STOCK as positive element, the reservation has confirmed qty = 0.
In the meantime, on 13.1.2016, a spare parts sales order for 2 pcs with req date 20.1.2016 is created in a different MRP AREA (sloc YYYY) , which is replenished through STOCK TRANSFERS from storage location XXXX.
MRP on the spare parts MRP area creates a stock transfer request from XXXX to YYYY.
On 14.1.2016 two requirements exist on the production MRP area: the STO towards SPP MRP area, and the production order reservation.
When the 2 pcs originally purchased for the production reservation will be received, to which object will they be assigned?
The answer is: it depends.
If the ATP on production order is executed before the ATP on STO, goods will be assigned to the prod order. Else, they will be assigned to the STO.
The issue would be much more significant with long-lead time (i.e. 3 months) materials.
I know it's "part of the game" in a MTS scenario, but i was wondering if there's any BEST PRACTICE or suggested configuration to minimize the impact of separated ATP checks for sales/STO and production orders in a MTS scenario.
Thanks!
Mauro