Optimizing with APS
Advanced planning and scheduling (APS) systems are similar to ERP systems in that they have separate modules for planning procurement, production, and distribution, but the way those modules interact to produce a master schedule is different. Rather than taking a demand forecast as an input, most APS packages include a demand planning module to generate that forecast for you (Figure 11.4). The demand planning module passes its forecast to a master planning module, which calls on the services of three subordinate modules to work up the best plans for purchasing, production, and distribution.
Figure 11.4. The APS Planning Process
All three of these specialized planners work on the problem concurrently, feeding tentative plans ...
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