problem with scheduling planned orders in MRP

[Former Member]

There is a problem with scheduling planned orders in MRP. SFG is assigned to the BOM of FG. No inhouse production time maintained in the material master of SFG & FG. routing maintained for both . In OPU5 scheduling & capacity reuiremnts tickmarked for detailed scheduling. Scheduling level - via detaied scheduling. Scheduling type - backward. Adjust basic dates , adjust dep. req. to order start set. In MD02 , scheduling is via ' lead time scheduling'.

My problem is the start date & time & finish date & time is same for planned orders of FG & SFG in the detailed scheduling tab of the planned orders. (Duration is same because of same capacity requirements on the same work centre. But how is the finish date same for both SFG & FG?)

(Capacity requirements are being generated.)

What could be the problem ?

[Former Member]

Hi,

After updating the scheduling results through CA96 in the material master the scheduling comes correct.

But 2 questions here

1) Is it always necessary to maintain either the lotsize dependent or lot size independent inhouse production time in the material master ? because otherwise the scheduling will not come right.

2) SFG planned order is finished on the previous day of FG planned order .What should be done to make the SFG available sometime before the FG's 1st operation start date ?

[rupesh_brahmankar3]

Dear,

By scheduling the routing and maintain lot size dependent time in material is best practice and result of scheduling will be consistent.

If you want SFG before FG you need to define lead time offset in BOM or need to maintain the floats before production.

Hope clear to you.

Regards,

R.Brahmankar

[Former Member]

Hi Brahmankar,

Lead time offset has to be given in days, right.

So say if my FG manufacturing duration is from 3.00 to 5.00 , then logically my SFG manuf. duration should be from 1.00 to 3.00 if it takes 2 hrs. how can this be achieved with lead time offset in BOM?

[Former Member]

Hi

There is going to be problem especially when SFG's are involved .

To overcome such problems pl. go to CA96 & update material master with timings of routings for both FG & SFG.

It will get resolve.

Regards

YMREDDY

[Former Member]

Have you checked the formula for scheduling in WC ?

Apparently , times in Routing are not being used for scheduling as the order has the same start and finish times.....

[rupesh_brahmankar3]

Dear,

Please refer my reply for same issue from this thread,

Regards,

R.Brahmankar