Understanding MPS Generation for Batch Bills
Use the MPS - Gross Regeneration version of the MRP/MPS Requirements Planning program (R3482) to generate a master schedule for all items or for selected items. This program functions in different ways, depending on whether more than one batch bill exists.
If only one batch bill exists, MPS uses the batch quantity:
As a multiple, if the net requirements are greater than the batch quantity.
As a minimum, if the net requirements are less than the batch quantity.
In either case, the program generates a separate planned order for each batch quantity.
For example:
Batch Quantity |
MPS Requirement |
Resulting MPS Planned Order |
|---|---|---|
1000 |
1500 |
1000 1000 |
1000 |
967 |
1000 |
If the batch quantity is 1000 and the MPS requirement is:
1500, the program generates two planned orders for 1000 each.
967, the program generates a planned order for 1000.
If one batch bill is greater than all of the batch quantities, the program uses the largest batch quantity in combination with any of the other quantities to most accurately satisfy the requirement.
For example:
Batch Quantity |
MPS Requirement |
Resulting MPS Planned Order |
|---|---|---|
400 600 800 1000 |
1500 |
1000 600 |
400 600 800 1000 |
3000 |
1000 1000 1000 |
Assume the batch quantities are as shown in the following list and the MPS requirement is for 1500:
400
600
800
1000
The program generates a planned order for 1000 and a planned order for 600. Using the batch quantities, 1600 is the quantity that most accurately satisfies the requirement.
If multiple batch bills exist and the net requirement is less than the largest batch quantity, the program uses the next highest batch quantity to satisfy the requirement.
For example:
Batch Quantity |
MPS Requirement |
Resulting MPS Planned Order |
|---|---|---|
400 600 800 1000 |
780 |
800 |
Assume the batch quantities are as shown in the following list and the MPS requirement is for 780:
400
600
800
1000
The program generates a planned order for 800.
After you generate a master schedule, use MPS Time Series (P3413) and MRP/MPS Detail Message Revisions (P3411) to review the time series and messages from the MPS generation.
The time series is a record of time-phased supply-and-demand netting for selected items. The messages reflect how the system uses batches to generate order quantities for net requirements for each time period.