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Monday, December 15, 2014

Oracle Standard Pegging

Standard Pegging

The standard pegging process makes two passes through the demands and supplies.

First Pass

The planning engine groups demands into daily windows. It does not use profile option MSO: Demand Window Size. The first window starts at the first demand date and the last window ends at the end of the planning horizon.
For example, the demand window size is 1 day, the first demand is due on day 5. The first demand window is from day 5 to day 5, the second demand window is from day 6 to day 6, and the third demand window is from day 7 to day 7.
Demands in each window are sorted by demand priority in ascending order.
The planning engine groups supplies into daily windows. It does not use profile option MSO: Supply Window Size. The first window starts at the first supply availability date and the last window ends at the end of the planning horizon.
For example, the supply window size is 1 day, the first supply is available on day 7. The first supply window is from day 7 to day 7, the second supply window is from day 8 to day 8, and the third supply window is from day 9 to day 9.
Supplies in each window are sorted by type using the following order:
  1. Firm supplies
    1. On-hand
    2. Receipt shipment, intransit shipment, payback supply (Oracle Project Scheduling)
    3. Work order (firm), job by-product supply (firm), purchase order (firm), non-standard jobs, non-standard job by-product supply (always considered firm)
    4. Purchase requisition (firm)
  2. 2. Existing supplies
    1. Work order (non-firm), job by-product Supply (non-firm), repetitive schedule, repetitive schedule by-product supply, flow schedule, flow schedule by-product supply, purchase order (non-firm)
    2. Purchase requisition (non-firm)
  3. Planned supplies
    1. Planned order (firm), planned order by-product supply (firm). You can raise the pegging priority of firm planned orders by releasing them.
    2. Planned order (non-firm), planned order by-product supply (non-firm)
The supplies in each type are sorted as follows:
  • On-hand: Lot expiration date and then quantity in ascending order to use expiring lots first. A demand pegging to an expiring lot must have its demand date earlier than the lot expiration date; therefore, some expiring lots may not peg.
  • Firm: By date in ascending order within each type.
  • Non-firm: By quantity in ascending order within each type.

Second Pass

The planning engine begins from the first demand window and pegs demands by demand priority to supplies of the first supply window. If necessary, it continues the pegging process with the next supply window.
As all demands in the each demand window are pegged, it moves to the next demand window and pegs as it did in the first demand window
Unpegged supplies are posted to excess.
In this example, demands D1 and D2 are sorted by priority in ascending order and supplies S5 and S6 are sorted by type. Pegged entities are connected by arrows.
Pegged Entities
the picture is described in the document text
Standard Pegging Example
This example shows standard pegging for two items. It begins with various settings and then shows the pegging for each item.
Profile option MSC: Use FIFO Pegging is No.
Plan option Peg Supplies by Demand Priority: Cleared.
In standard pegging, the planning engine uses 1 as the value for MSO: Demand Window Size and MSO: Supply Window Size and ignores the entered values.

Item A101 Pegging

This diagram shows the demands, supplies, and pegging information for item A101. Demand priorities are in parentheses, pegged entities are connected by arrows, and split supply quantities are in brackets.
The first demand window starts on day 3 at the first demand date.
Supplies in the first supply window [day 1] are pegged in the following order:
  • On-hand of quantity 25 on day 1 and demand quantity of 100 on day 3
  • Firm planned order of quantity 10 on day 1 and demand of quantity 100 on day 3
  • Non-firm planned order of quantity 50 on day 1 and demand of quantity 100 on day 3
Supplies in the second supply window [day 2] are pegged in the following order:
  • Firm planned order of quantity 5 on day 2 and demand of quantity 100 on day 3
  • Non-firm planned order of quantity 35 on day 2 (for partial quantity 10) and demand of quantity 100 on day 3
  • Non-firm planned order of quantity 35 on day 2 (for partial quantity 25) and demand of quantity 100 on day 4
Supply in the third supply window [day 3] is pegged as non-firm planned order of quantity 75 on day 3 and demand of quantity 100 on day 4
Pegged Entities

the picture is described in the document text