The aim of this study is to investigate the performance of a multi-item dynamic lot'-sizing method when it is applied under rolling schedule environment over 300 planning periods. A heuristic lot-sizing method using DP equation has been proposed for a problem in which a common and an individual setup costs are given. In this study, a revised lot-sizing method which reduces a calculation time is proposed. As a result of a simulation, we find that the average cost per period with the revised method under rolling schedule environment may be less than the average cost of lot-sizing for the whole demands of 300 periods.