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Master Scheduling (1. Master scheduling principles (Objectives of master…

- - - - Range: finished goods < raw materials for the finished goods
      - MPS & FAS: support the building of finished items to forecast
      - Decoupling point: at finished goods inventory
    - - Range: finished goods > the raw materials > the components and subassemblies
      - MPS & FAS: MPS supports the building of options from raw materials and FAS supports the production of end products from options after the receipt of orders.
      - Decoupling point: at standardized options
    - - Range: finished goods > the raw materials
      - MPS & FAS: MPS supports the planning of raw materials and components; FAS supports the building of the final product to match the customer order.
      - Decoupling point: at raw materials and components
  - - - planning hierarchy
      - forecasting
      - customer orders
      - order promising
    - - distribution requirement planning
      - logistics planning
  - - - impact of different environments on master scheduling
        
        marketplace/ customer expectations
        
        manufacturing requirements: appropriate production process, methods used to manage sales volume fluctuation, choice of unit of production
      - impact of product structure on master scheduling
        
        bill of material
- - - - demand time fence (DTF)
        usually cover the period of actual production time
      - planning time fence (PTF)
        the extra time gives the master scheduler a forward view of products and modules as they move toward the demand time fence and into the frozen planning zone.
      - option over-planning
        allow changes in mix and subject to the constraints of the production plan, in volume.
  - - - discrete available-to-promise
        
        calculate the ATP for period 1
        ATP period 1=on-hand quantity +MPS receipt quantity - sum(customer order before next MPS)
        
        calculate the ATP for all other periods
        ATP next MPS period = MPS receipt quantity - sum(customer order before next MPS)
      - cumulative available-to-promise