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298                                                 PART 3      Managing with the MRP System


           FIGURE 17-1
                                                                          Finished Part
           Remanufacturing
           bill of material.


















                                                      Replacement
                                                         Part



                               Replacement
                                   Part







                                                                              Received Core




             142095 Clock, disassembly
              142503 Inner works             –1 each
              123291 Hands                   –2 each
              123032 Face                  –0.5 each
              136958 Clock                    1 each

             Notice that this BOM contains a negative amount for three of the items. This allows stan-
        dard material planning systems to be used to control the remanufacturing operation. Since
        MRP was designed originally to support a one-to-one or many-to-one relationship between
        components and parents parts, attempting to plan multiple parent parts on a single order is
        not possible. Having a negative amount in the BOM allows a standard system to handle the
        fact that one item is made into many in the initial remanufacturing disassembly phase.
             The first step in a standard work-order release is to create a work-order number and
        then issue the materials to that order. In this case, the order would be created for the dis-
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