A Study of Economic Design for Moving-Average Control Charts via Taguchi Loss Functions

• Main Authors: Huei Ru Lin, 林慧如
• Other Authors: Fong-Jung Yu
• Format: Others
• Language: zh-TW
• Published: 2005
• Online Access: http://ndltd.ncl.edu.tw/handle/90877091493639366479

碩士 === 大葉大學 === 工業工程與科技管理學系 === 93 === Sub-group size (n), sampling interval (h) and control-limit width (k) are the design parameters of control charts. They are selected as n=4 or 5, k=3 and h will be decided by quality engineer based on process situation in the conventional control charts. Duncan first proposed the economic design of control charts to control normal process means in 1956 and to ensure that such a design actually lowers the cost, in comparison with a Shewhart control chart. His research method has been widely used in subsequent studies on the subject. An economic design of moving average (MA) control charts has been proposed by Yu and Chen in 2005. This study considers the Taguchi’s loss functions to extend Yu and Chen’s model to construct an economic design of MA control charts. Numerical example is also employed to demonstrate the model’s working.