SSI's approach appeals to process manufacturers, as well as some discrete manufacturers with short lead times and high volumes, where the traditional manufacturing resource planning (MRP) approach often shows many shortcomings (and can even be a recipe for disaster).
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and at what time. It will also highlight any shortages, and identify any existing purchase orders or schedules (or requisitions) that could satisfy the shortage. This material call-off schedule is linked to the production schedule, and therefore any changes to production plans will automatically update material needs. Production stock locations have re-order point, back-flushing, safety stock, and Kanban functionality, according to the type of material, and can each have different provisioning parameters