Chapter 18. Materials Requirements Planning. Outline: Material Requirements Planning (MRP) Master Production Schedule (MPS) Bill of Materials (BOM) Time Fences MRP Logic and Product Structure Trees MRP Examples MRP and Lot Sizing MRP & Capacity Requirements Planning (CRP).
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Low-level coding requires that when an identical item occur on multiple levels, then it should be “lowered” to its lowest level for computational reasons. The software will complete all level 0 items first, then all level 1 items, etc.
In the original diagram (a) since N appears on levels 1 & 2
In the final diagram (b) (after re-classification) it is lowered to level 2.
Also, note that S under P was on level 3, which needed to be lowered to level 4
D(5)Capacity Requirements Planning (CRP)