Abstract
In Maruzen Industry, we have made virtual factory that simulate daily order and daily product of factory in 1/8 model, to simulate our industry. And we have optimized the way of scheduling and optimum buffer through this virtual simulator. We already knew that pull type scheduling is effective in our mind, but we had thought there are a little change and we did not want to change our system by then. Through approximate optimization, we noticed that there are big differences between push type scheduling, and there seems no change inside factory. So, we have changed our scheduling scheme, and this is a report of the fact in our industry.
