STUDIES ON THE COMPUTER SIMULATION FOR OPERATION OF JOB SHOP IN TEXTILE INDUSTRY

(I) ON A SYSTEM SIMULATION METHOD OF WEAVING SHOP

Abstract

In order to try the computer simulation for the job shop of weaving as an example of complicated textile processing system, for purpose of analyzing its behavior and grasping its characteristic, it was tried to establish the algorithm of the simulation and develop the simulation codes.
Analysis for transmission and conversion of the production information flow on the processing system is studied in relation with the system parameter which is entropy as definition for the complication degree of system, and the experiments by using simulators are tried. Source programs for the simulators are coded about the order part and the weaving part, separately.
On the order hand, the program is coded by planning to obtain the production informations concerning the goods ordered, by using Monte Carlo simulation method which compares the distribution of receiving probabilities of each order with the value of Random Number.
On the production line part, program is coded by planning to obtain the informations concerning the selection method of loom which decides the input time and processing sequence of the lots for each loom by executing one policy, and to compute the weight of production as output from system. The policy is planned in compliance with the production informations and the rate of operation of each loom.
Performance of these simulators are tested by the operation simulation during two years in compliance with the policy under existing circumstance and the betterment of the policy.