ATP check - behaviour different from standard requested
Hello my friends Gurus,
Happy new year to everybody.
I understand that ATP calculation in sales document is different in case of the procurement type in MRP2 view is F (external procurement) or E (in-house production). The system takes into consideration respectively GR times (Purchasing and MRP2) + Planned Delivery Time (MRP2) for "F" materials and GR times (Purchasing and MRP2) + Total Replesnishment Lead Time (MRP3) for "E" materials.
For business reasons (as for instance transfer order between plants, specific program ...) we can't change the procurement type in Plant for F materials.
So the question is quite simple : is there a way for influencing the ATP check and calculation by passing to the system others parameters of dates, as for instance Planning Time fence or Total Replesnishment Lead Time ? Have you already met such demand and how do you manage this ?
Of course we could go through (I suppose) an user-exit but we appreciate customizing proposals.
ps : parameters in availability check control in customizing : all is flagged in Stocks box except "Incl. restricted-use stock", all in flagged into In/Outward movements box except "Incl. ship notification", Check without RLT is not flagged, rule A in Receipts in past.
Thanks in advance for your feedbacks, it will be appreciated.