GATP : Loosing order confirmation

Question

Hi,
I am facing a problem where I loose order confirmation for a line item with multiple schedule lines if I change one of the confirmed lines within the frozen period.
I understand GATP checks at item level. Then how to stop GATP not to check other schedule lines and check only the schedule line whose date is changed?
thanks in advance,
shan

Answer 1

Hi SHAN,
The Product Availability Checking Concept in APO is similar to that of R3.
Only that the GLOBAL AVAILABILITY CHECK in APO includes additional features as Product Allocation, Product Availability, Check against forecast, Rules Based ATP, Multi ATP etc.
Now when do we get multiple schedule lines:
On the Requested Delivery Date, if there is no stock available for a material
the confirmation falls on those dates on which there is stock expected.
EXAMPLE:
<b>MDO4 Screen:</b>
Material: xxxx, Plant: yyy
May 21, 2007: Stock: 0
May 23, 2007: PurchaseOrder - 10
May 24, 2007: Production Order: 10
Now when you place a sales order with a requested delivery date of May21, 2007 for 20 quantity. ( Say the Transit time =0 and there are no other sales orders placed for this material/plant)
You will see the following schedule lines
May 21, 2007: Confirmed Qty = 0
May 23,2007: Confirmed Qty=10
<b>May 24,2007: Confirmed Qty=10</b>
However say you had all the stock on May 23, 2007, you would have got only 2 schedule lines as follows
May 21, 2007: Confirmed Qty = 0
May 23,2007: Confirmed Qty=20
Lets think why this happens: The availability check is done against the SCOPE OF CHECK( Business Event-A and Availability Checking Group =xx on the material master) at the line item so that it checks all the incoming and outgoing receipts and requirements for the material in that plant and then arrives at the MATERIAL AVAILABILITY DATE which is determined according to the Stock Availability
The first schedule line is the date which you have requested the 20 quantity and the system gives you a confirmed qty for 0 on the date which you requested.
Now the other schedule lines are the confirmed dates which the system has proposed based on availability check.
Now coming to your question: When I change the date on one of the schedule lines
Say in this example: the third line which is bold
So in a way you are changing the DELIVERY DATE,
When you change the delivery date, availability check happens again at the line item and new schedule lines are determined.
The answer to your question- " Then how to stop GATP not to check other schedule lines and check only the schedule line whose date is changed?" is a BIG NO as it is against the AVAILABILITY CHECK Concept both in R3 as well as APO.
However I would not totally decline as there is nothing which we cannot do in SAP. With customizing(ABAP CODING) anything is possible. It would not be very easy and would you be willing to spend so much time.
If you have any other questions, please feel free to ask me.
Regards
Kumar Ayyagari
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