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Aggregate Plan to Master Schedule

Aggregate Plan to Master Schedule. Aggregate Planning. Disaggregation. Master Schedule. Figure 13.4. Disaggregating the Aggregate Plan. Master schedule : The result of disaggregating an aggregate plan; shows quantity and timing of specific end items for a scheduled horizon.

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Aggregate Plan to Master Schedule

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  1. Aggregate Plan to Master Schedule AggregatePlanning Disaggregation MasterSchedule Figure 13.4

  2. Disaggregating the Aggregate Plan • Master schedule: The result of disaggregating an aggregate plan; shows quantity and timing of specific end items for a scheduled horizon. • Rough-cut capacity planning: Approximate balancing of capacity and demand to test the feasibility of a master schedule.

  3. Master Scheduling • Master schedule • Determines quantities needed to meet demand • Interfaces with • Marketing • Capacity planning • Production planning • Distribution planning

  4. Master Scheduler • Evaluates impact of new orders • Provides delivery dates for orders • Deals with problems • Production delays • Revising master schedule • Insufficient capacity

  5. Master Scheduling Process Figure 13.6 Inputs Outputs Beginning inventory Projected inventory Master Scheduling Forecast Master production schedule Customer orders Uncommitted inventory

  6. Projected On-Hand Inventory Projected on-handinventory Inventory fromprevious week Current week’srequirements - =

  7. Beginning inventory Forecast is larger than customer orders in week 3 Customer orders are larger than forecast in week 1 Forecast is larger than customer orders in week 2 Projected On-Hand Inventory Figure 13.8

  8. Available-To-Promise Inventory • Available-to-promise (ATP) inventory: The quantity of end items that marketing can promise to deliver on specified dates.

  9. Time Fences Time Fences: points in time that separate phases of a master schedule planning horizon.

  10. Time Fences in MPS Figure 13.12 Period “frozen”(firm orfixed) “liquid”(open) “slushy”somewhatfirm

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