Design of production control systems: Choice of system structure and systems implementation sequence

Control theory methods, used so successfully in the design of mechanical and electrical systems, are applicable to the design of production control systems. What is surprising, is that the methods are not in more regular use. Discrete linear control is particularly useful because, by using a library of computer routines and graphical output, it is possible for the practising manager to obtain time-dependent results. The method may be applied to multi-product, multi-level systems such as will be found, or are being contemplated, in many repetitive batch manufacturing organisations. Using this approach one may investigate, for example, the consequences of (a) implementing a new forecasting system; (b) using MRP rather than re-order cycle control; (c) improving the quality of data, e.g. by better stock recording or shop floor data collection; (d) shortening lead times. The rest of the paper describes how the system may be used.