MRP: Initial Setup Steps
Select the Use MRP Planning field on the MRP Mode form to enable the MRP planning mode. Then specify the parameters for your MRP system on the Planning Parameters form.
Note:  If you had 
                  been using the APS or Infinite APS planning mode, you must perform some 
                  preparatory steps before enabling MRP mode. See Switching 
                     from APS Mode to MRP Mode for more information.
               
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