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Material Planning with QRM
QRM draws attention to the fact that commonly used material planning and scheduling systems such as Material Requirements Planning (MRP), Manufacturing resource planning (MRP II), and Enterprise resource planning (ERP) do not include system dynamics in their analysis and do not make provision for the cost of long lead times.
QRM advocates simplifying existing MRP systems to a Higher Level MRP (HL/MRP) related to high-level planning and coordination of material and not with detailed scheduling of functions.