Schedule Relief (MRP and Supply Chain Planning Help)


	Previous	Next		Contents	Index	Navigation	Glossary	Library

Schedule Relief

Shipment Relief

Oracle Master Scheduling/MRP and Supply Chain Planning relieves (updates) MDS schedule quantities when you ship sales order items. Shipment (MDS) relief prevents the duplication of demand that could result if you load sales orders into the master demand schedule, but do not relieve the master demand schedule upon shipment. Without relief, you would need to reload and replan your master schedule just before planning material requirements each time to obtain an accurate picture of supply and demand for your independent demand items.

Shipping a sales order item relieves each MDS name for which you set the check Relieve. You set shipment relief when you define the master schedule name--before you define or load a schedule for that name. If you associate a demand class with your MDS, the shipment relief process relieves the MDS entries that correspond to the demand class associated with the sales order.

You can change the shipment relief option after initially creating your master schedule. If you change the shipment relief on an MDS from On to Off, shipment relief stops occurring against that master schedule. If you change the shipment relief option from Off to On, shipment relief occurs on that master schedule from the date you change the option onward.

For repetitive master demand schedule items, the Planning Manager begins at the start date of the schedule rate and relieves the schedule entry by eliminating days according to the rate. For example, suppose you have a master demand schedule with a daily rate of 10 per day over 5 days, beginning on Monday. You ship a sales order with a quantity of 12. The planning manager consumes the first day of the rate, accounting for 10 out of 12 shipped units. For the remaining 2 units, the planning manager creates a new schedule entry beginning and ending on Tuesday, with a daily rate of 8 (10 minus 2). The planning manager then resets the start date of the first schedule entry from Monday to Wednesday, and maintains the daily rate of 10 per day.

Production Relief

Oracle Master Scheduling/MRP and Supply Chain Planning relieves (updates) MPS schedule quantities when you create purchase orders, purchase requisitions or discrete jobs--whether you define the purchase requisitions or jobs manually or load them with the Planner Workbench.

Production (MPS) relief prevents the duplication of supply. Without relief, you would need to replan your master schedule just before planning material requirements each time to obtain an accurate picture of supply and demand for your MPS planned items.

Creating a purchase order, purchase requisition, or discrete job relieves each MPS name for which you check Relieve. You set production relief when you define the master schedule name--before you enter or load a schedule for that name. If you associate a demand class with your MPS, the production relief process relieves the MPS entries that correspond to the demand class associated with the discrete job.

You can change the production relief option after initially creating your master schedule. If you set or unset the production relief on an MPS name, production relief stops occurring against that master schedule. If you change the production relief option from Off to On, production relief occurs on that master schedule from the date you change the option onward.

Oracle Master Scheduling/MRP and Supply Chain Planning also updates the MPS schedule quantities when you reschedule discrete jobs, or when you change discrete job, purchase order, or purchase requisition quantities.

Attention: Oracle Master Scheduling/MRP and Supply Chain Planning does not consume MPS entries for repetitive items. Repetitive schedules are recalculated each time the planning process runs. Therefore, it does not decrease the MPS for repetitive items.

MPS Relief of Phantoms

If you define any phantom items with a planning method of MPS Planned, production relief occurs when the discrete job for the phantom's parent is created.

Supply Chain Planning users can also relieve production schedules for phantom items with a planning method of MPS/DRP Planned.

Maintaining the Accuracy of the MPS

Typically, when Oracle Master Scheduling/MRP and Supply Chain Planning relieves a master production schedule, it decrements (decreases) one or more schedule entries because you created a discrete job or purchase requisition, or increased the quantity on an existing job or requisition. However, when you decrease the quantity on an existing job or purchase requisition, close the job short of the full job quantity, or cancel the requisition line, Oracle Master Scheduling/MRP and Supply Chain Planning increments (increases) one or more schedule entries, if possible. Oracle Master Scheduling/MRP and Supply Chain Planning never increments a schedule entry by more than the original schedule amount.

Viewing Master Schedule Relief Information

You can view itemized information about the sales order shipments and discrete jobs that relieve your master demand and master production schedules respectively with the MDS Reliefs or MPS Reliefs window. The original schedule quantity shows you the quantity before schedule relief. The current schedule quantity is the relieved schedule quantity. The difference between the original and current quantity is the sum of all relief activity against the master schedule entry.

To compare this picture of your master schedule with previous or future versions, you can copy your master schedule periodically (by using the Load/Copy/Merge Master Schedule window) and store the copy for later comparison. Use the Schedule Comparison report to compare the different schedules.

Profile Options for Master Schedule Relief

You have the option to temporarily disable shipment and production relief by setting the MRP:Consume MDS profile and MRP:Consume MPS profile options to No. The Planning Manager verifies the setting of this option before performing shipment and/or production relief. If it is set to No, the Planning Manager does not update MDS and/or MPS entries. The Planning Manager processes any sales order shipments and/or purchase requisitions and discrete jobs occurring while this profile is set to No when you set the profile option back to Yes.

Note that this affects all master demand and master production schedules that have relief set to Yes.

You can also specify the direction in which the production relief takes place by using the MRP: MPS Relief Direction profile option. If you specify Backward, then forward, Oracle Master Scheduling and Supply Chain Planning relieves master production schedule entries backwards from the discrete job due date then forwards until it finds enough schedule quantity to relieve. If you specify Forward only, Oracle Master Scheduling and Supply Chain Planning relieves master production schedule entries only forward from the discrete job due date until it finds enough schedule quantity to relieve.

Attention: When you change any of these profile options you must restart the Planning Manager to activate the new profile option.

Planning Manager and Schedule Relief

The Planning Manager is the background process that manages shipment and production relief.

For shipment relief, the Planning Manager first looks for the specific sales order entry to find a specific schedule entry to relieve. If it does not find an entry for that exact sales order date, the Planning Manager begins at the oldest schedule entry for the item and moves forward in time, decrementing schedule entry quantities until is reaches the sales order shipment quantity.

For example, suppose you have MDS entries of 10 each on Monday, Tuesday, and Wednesday. If you ship a sales order for 25 on Tuesday, the relief process deducts 10 on Tuesday (leaving 0), deducts 10 on Monday (leaving 0), and deducts the remaining 5 on Wednesday (leaving 5). Thus, the new master schedule entries are quantity 0, 0, and 5 on Monday, Tuesday, and Wednesday, respectively.

For production relief, the Planning Manager first looks at the discrete job due date to find an MPS schedule entry to relieve. It then looks backward, up to the first schedule entry, and then forward until it finds enough schedule quantity to relieve.

For example, suppose you have MPS entries of 10 each on Monday, Tuesday, and Wednesday and you specify the MRP: MPS Relief Direction profile option as Backward, then forward. If you create a discrete job for 25 on Tuesday, the relief process deducts 10 on Tuesday (leaving 0), deducts 10 on Monday (leaving 0), and deducts the remaining 5 on Wednesday (leaving 5). Thus, the new master schedule entries are quantity 0, 0, and 5 on Monday, Tuesday, and Wednesday, respectively.

Attention: When it operates, the Planning Manager may run for a very short time only, making it difficult to determine whether is it running. To be sure, examine the messages in the Planning Manager window. Messages should increment periodically. Whether you use shipment or production relief, you should activate the planning manager and leave it running. The planning manager performs maintenance tasks vital to the proper operation of Oracle Master Scheduling/MRP and Supply Chain Planning.