The economical-statistical design of double sampling X-bar control charts

• Main Authors: Nai-Yi Liao, 廖乃毅
• Other Authors: Chau-Chen Torng
• Format: Others
• Language: zh-TW
• Published: 2007
• Online Access: http://ndltd.ncl.edu.tw/handle/58423738517293552526

碩士 === 國立雲林科技大學 === 工業工程與管理研究所碩士班 === 95 === As today’s manufacturing firms are moving towards agile manufacturing, a fast and economical on-line statistical process control solution is in high demand. Multiple sampling control charts are such an alternative. One successful application of the multiple-sampling control charts is the use of a double sampling (DS) control chart in replacement of traditional control charts for on-line statistical process control in industries. A DS chart is quicker and more sensitive than the traditional Shewhart chart in detecting the mean shift in a process. A control chart design parameters such as sample size, time between sampling and the spread of the control limits from the center line could be determined based on a cost viewpoint. The Duncan’s economical model is widely used to determine optimum control chart design. We modify Duncan’s economical model based on the concept of DS control charting and optimize the cost function in determining the control chart design parameters. The sensitivity analysis was also performed.