The Economic Design of Asymmetric Cumulative Sum Charts —An Application of Quadratic Loss Function
碩士 === 東海大學 === 工業工程學系 === 87 === The control chart is an important tool in process monitering, and it helps operators to evaluate the process is in control or not. Cumulative Sum Chart which is one of the modification of Shewhart control charts are sensitive in detecting the variations of process a...
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| Format: | Others |
| Language: | zh-TW |
| Published: |
1999
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| Online Access: | http://ndltd.ncl.edu.tw/handle/42702887571276841320 |
| Summary: | 碩士 === 東海大學 === 工業工程學系 === 87 === The control chart is an important tool in process monitering, and it helps operators to evaluate the process is in control or not. Cumulative Sum Chart which is one of the modification of Shewhart control charts are sensitive in detecting the variations of process and are suitable for the high-technology industry nowadays. In this research, the Cumulative Sum Chart is used for supervising the process. An economic design of asymmetric cumulative sum chart which is based on Duncan’s[7] model have been developed. The Quadratic loss function which was defined by Taguchi[35] is utilized in the model developed as well. Thus, and it can distinguish "equivalent standard" from "equivalent quality" and is more appropriate to modern quality of evaluations and consumers oriented. It is assumed that there are two assignable causes exist in a process. These two assignable causes either enlarge or relieve the effect of shifting in a process, and are consistent with realities. When apply the same process parameters the single assignable cause model is a special example of the model developed.
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