Document Type : Research Paper


1 Department of Industrial Engineering, KHATAM Institute of Higher Education, Tehran, Iran

2 Department of Industrial Engineering, University of Alzahra, Tehran, Iran


Shop floor performance has great influence on performance of a manufacturing system. Traditionally, shop floor operational policies concerning maintenance scheduling, quality control and production scheduling have been considered and optimized independently. Anyway, these aspects of operations planning have an interaction effect on each other significantly and hereupon for improving the system performance; they need to be considered commonly. The main objective of this study is to provide a new approach in the quality control process. x control chart has been used in previous models, but in this study to improve the quality and increase the accuracy, cumulative sum control chart which is useful for detecting small changes by considering previous information of process is used and causes 5% improvement in objective function in the case that x control chart was used.