Production Planning and Control

 APP does not account for the detailed timing of flow within the production system  MRP material requirement planning was developed to deal with the complexity of these problems.

 Difference between Aggregate production planning and Material requirement planning?  Aggregate production planning do not account for the detailed timing of flow with in the production

 When a master schedule is proposed, the first problem is to convert it efficiently into the requirements for purchased and manufactured parts. This is referred to performing a parts explosion  T o present a formal description of the problem, lets divide item produced into three categories, end items, subassemblies and parts.  Notations  End items “e”  Sub assemblies “s”  Parts “p”

 Let bill of material for an end product is defined by row vector B i B i =(b i1, b i2,…… b ij) Where b ij is the number of items j required to make directly 1 unit of item i. This is the representation of number of parts in one unit This is the representation of total quantity of parts