CONTROL STRATEGIES FOR INVENTORY MANAGEMENT

摘要

This paper describes a control systems approach to the management of inventory.Normal inventory operation is an example of proportional control. Several controlalgorithms including Pseudo-Derivative Feedback (PDF), Proportional, Integral andDerivative (PID) and Feedforward control are used in this paper to produce a moresophisticated form of inventory operation that can easily reduce stock levels by up to80% compared to 20-30% with MRP and hence reduce cost. Settling times are reducedby a factor of 50%. Modelling was achieved using the Simulink simulation packageusing equations developed by Ferris and Towill for a single level industrial systemmodel rather than a conventional System Dynamics computer package. The bestcontroller is shown to be a PID controller with Feedforward. This controller did notcause any significant oscillatory inventory level changes. These techniques comparewell with other investigators using control strategies. This has special significance forJIT and MRP methods.