Master planning

8 important questions on Master planning

Master scheduling level

physical units of production at the end item level
3-18 months

Production planning is the major output of S&OP and is concerned with:

  • planning for each product familiy
  • maintaining desired inventory levels
  • determining resources required
  • comparing load with available resources

Production plan faces the following typical situation

  • aproximately a 12-36 month horizon
  • a monthly rate
  • demand fluctuates or is seasonal
  • plan is made for productfamilies
  • plan and equipment usually are fixed
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Four basis productionstrategies

  • chase
  • level
  • hybrid
  • subcontracting

Information needed for MTS production plan

  • forecast for the time period for the planning horizon
  • opening inventory
  • desired end inventory

Master production scheduling purpose

  1. link the production plan at the product familiy level at the end item level
  2. create the priority plan for end items manufacturing
  3. basis for calculating the rough cut capacity plan
  4. drive the material requirements plan, which takes the priority plan to the component due date and quantity level

Time fences and zones:

  • liquid: forecast only, changes constraint by production plan
  • slushy: actual & forecast ( trade offs)
  • frozen: actual order ( emergency changes only)

Available to promise calculating

by adding scheduled receipts to the beginning inventory and the subtracting actual orders scheduled before next MPS- scheduled receipts

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