Example for Determination of Availability Date 

If you use period lot sizing in MRP and set the availability date as the period start, the system determines the availability date from the delivery date and the goods receipt processing time. The system then reschedules the availability date to the start of the next period that lies after the calculated availability date.

Example Data

MRP type

Material requirements planning

Lot size:

  • Lot-sizing procedure
  • Lot size indicator
  • Scheduling

 

  • P (period lot size)
  • M (monthly lot size)
  • 1 (Period start = availability date)

Procurement type

F (External procurement)

Planned Delivery Time

20 calendar days

Goods receipt processing time

1 working day

Dependent requirements

29 August, 30 September and 31 October

Planning Result

The planning run was executed on 14 August. The system schedules the following dates:

29.08.

DepReq

2 individual requirements

100,00-

30.09.

DepReq

5 individual requirements

150,00-

01.10.

Pl.ord

0000001000

100,00

01.10.

Pl.ord

0000001001

150,00

01.10.

Pl.ord

0000001002

300,00

31.10.

DepReq

3 individual requirements

300,00-

The system displaces the availability dates for planned orders 1000 and 1001 to the start of the next period possible (1 October) which lies after the date (4 September) determined by forward scheduling.

The date 4 September results from forward scheduling from 12 August + 20 calendar days + 1 day for goods receipt processing time.