The Optimal Planning of Computerized Manufacturing Systems. Report No. 4. Simulation of a Computerized Manufacturing System,

摘要

Computerized Manufacturing Systems (CMS) provide a capability to economically produce small to medium quantities of a wide variety of parts which demand exacting tolerances. The control logic and material flow in an automated manufacturing facility are very complex,but can be successfully examined through the use of a computer simulation. The simulation provides not only an economical means of testing proposed improvements but also gives a framework for understanding the causal relationships which directly affect the productivity and efficiency of the system. A simulation in GASP IV was developed,verified and validated. An experiment was devised to test alternatives to the current design. Results show that: (1) the best part movement policy is one which allows the most freedom with respect to subsequent moves; (2) the best temporary storage location is one which is balanced with respect to the traffic of parts in the system;and (3) the best input policy is one which allows the stockpiling of a limited number of the parts with shorter cycle time to allow for uninterrupted periods of work on the parts with the longer cycle time.