DETERMINING THE IDEAL RATIO OF WORKER AND MACHINE TO INCREASE OPERATOR’S UTILIZATION

Abstract

This thesis is mainly focused on determining the ideal ratio of worker and machine to increase operator’s utilization in auto rooting process area. Low operator’s utilization could give impact to operator productivity and cost of production. Therefore, the ideal ratio of worker and machine should be determined to avoid excess resource. In order to determine the ratio of worker and machine, a time study should be conducted. By using time study the standard time of operator could be established, and it will be used to create a simulation model of ideal worker and machine ratio. There are three scenarios of ideal worker and machine ratio that the author made. Those three scenarios are compared by using Bonferroni approach to get the best scenario of ideal worker and machine ratio. The result of Bonferroni approach shows that the ideal ratio of worker and machine is one operator for three machines. By implement this ideal ratio, the operator utilization can be increased up to 26% and the operator productivity can be increased up to 67%.