抄録
In the recent years, consumers' demands are diversifying rapidly and complexly. In order to deal with the fluctuation of such consumers' demands effectively, manufacturers compose production planning and production scheduling by taking unconfirmed orders into consideration. Due to the difficulty of estimating consumers' demands, estimation errors occur when the unconfirmed orders become confirmed orders. Thus, it is important to understand how the estimation errors affect on the productivity in target manufacturing systems. In this paper, we mount an APS system on a Distributed Virtual Factory (DVF) which is modeled as an assembly type factory. The effects of the unconfirmed orders are observed from variety of viewpoint including product cost through experiments with the DVF.
