Hi Anshuman
Cumulative ATP - Cumulative Availability to Promise is the quantity of material that can be promised to deliver, while checking for availability, considering all possible incoming and out going stock for that material.
Eg.
1. If we are expecting have incoming stock through purchase orders already created let us say 100 on 30th Sept. 2009
2. If we have created sales order with delivery Qty. of 50 to be delivered on 25th Sept. (i.e. out going stock)
3. If we also have stock comming from production order such that stock will be ready for sale by 20th Sept 2009 say 200 Qty.
4. And finally we have 25 items of the stock today.
So we can say that Cumulative ATP qty. as of 30th Sept is (100-5020025) = 275
Also you may check out for T Code OVZ9 where you can specify which all inward and outward movements of stock you want to consider for availability check.
I hope this helps is answering your question.
Thank You
Vinayak. M. G.
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