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CHAPTER 12   Master Production Schedule                                         237


             The closed-loop approach made possible by the capabilities of an MRP system
        applies equally to MPS development (reviewed in the discussion of resource require-
        ments planning earlier in this chapter) and to MPS implementation. This is illustrated in
        Figure 12-7, a logic diagram of the procedures described in this chapter thus far.


           FIGURE 12-7                           Sources of Demand
           MPS
           development and
           implementation.                          Consolidation
                                                    Schedule of
                                                      Factory
                                                    Requirements
                                                 Product   Load
                                                Lot Sizing  Leveling
                                                    Prospective
                                                      Master
                                Development         Product Mix
                                                     Production
                                                     Schedule

                                                     Resource
                                                    Requirements
                                                     Planning


                                                     Resources  No
                                                     Available?

                                                         Yes

                                                     Authorized
                                           Modify     Master      Modify
                                                     Production
                                                     Schedule
                                                       MRP
                                                      System
                                               Material   Requirements
                                                           Capacity
                                Implementation  No  Time     Plan       No
                                             Requirements
                                                Plan
                                                              Capacity
                                            Available?

                                             Yes             Available?
                                                                 Yes

                                                     Execution
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