PP Experts please help (COMAC) - Urgent

[Former Member]

Hi All,

I have a serious issue with coll. av. check as the standard SAP transaction COMAC is not helping me carry out av. check at operation level.

Eg:

Plant Stock for MtlF 3nos, MtlZ 4nos.

Wrk order - 1 for SubAssy-1

Crtd. on. - 25.1.08

Basic st dt. - 15.2.08

Opn 1 -> Execution Dt. 15.2.08 MtlA (2nos), MtlD(2nos)

Opn 2 -> Execution Dt. 12.3.08 MtlF (3nos), MtlZ(4nos)

Wrk order - 2 for SubAssy-2

Crtd. on. - 27.1.08

Basic st dt. - 01.3.08

Opn 1 -> Execution Dt. 01.3.08 MtlX (2nos), MtlR(2nos)

Opn 2 -> Execution Dt. 05.3.08 MtlF (3nos), MtlZ(4nos)

In the above example, when work order-1 is created & released, the av check is ok. But when i create work order-2, release & carry out coll. av. check MtlF & MtlZ is missing even though the need for these mtl's is earlier than that in work order-1. This is because the basic start date of the work order-1 is earlier than that of work order-2. I am unable to carry out the check based on operation execution date, but can only carry it out based on basic start date, which does not help my case.

I hope i have put across my problem clearly. I would like to know how i can overcome this shortcoming & resolve the issue?

Await inputs.

Vivek

[Former Member · Accepted solution]

Hi Vivek,

You are correct, material is reserved 1st work order which has created first,

Please try this, set "Put donot check" for "include depedent reservation field" at OPJJ for checking group & checking Rule combination .

Plz try and comeback

Regards

Pradeep

[Former Member · Accepted solution]

Hi ,

Thanks for the info, but if i am right, the Dependent requirements are relating to the planned order, so what difference would it make to my scenario as both are production orders.

I would like to know, in customizing there is a checking rule for backorder processing, is this the rule which is used by the system when it runs COMAC?

Also if i uncheck 'include sales reqmts' then if mtl is committed to a sales order will be reset as well? or there is no way to reset commitments made to sales orders?

Await inputs.

Anyone with any suggestions on how i can resolve this?????

Edited by: Vivek on Jan 9, 2008 7:25 PM

[Former Member]

During availabilty check if you are blocking the material for reservation then that material will become unavailable for any next availability check. If first availabilty requirement check falls in future then it get blocked for that reservation. It will not be available for second reservation even its requirement falls before first one.

But you can check by setting different checking rules for single order & back orders in customizing

Shivanand

[Former Member]

Mr. Shivanand,

I think in your post you're trying to explain the backorder processing, but it is not quite clear for me. Can you explain with a small example & also let me know, is the checking rule maintained in backorder processing which is used by the system during a COMAC run?

Vivek