Proceedings of the Safety Management and Science Conference (대한안전경영과학회:학술대회논문집)
- 2011.11a
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- Pages.535-549
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- 2011
A Study on the Application of CUSUM Control Charts under Non-normal Process
비정규 공정에서의 누적합 관리도 적용에 관한 연구
- Published : 2011.11.19
Abstract
Control chart is most widely used in SPC(Statistical Process Control), Recently it is a critical issue that the standard control chart is not suitable to non-normal process with very small percent defective. Especially, this problem causes serious errors in the reliability procurement, such as semiconductor, high-precision machining and chemical process etc. Procuring process control technique for non-normal process with very small percent defective and perturbation is becoming urgent. Control chart technique in non-normal distribution become very important issue. In this paper, we investigate on research trend of control charts under non-normal distribution with very small percent defective and perturbation, and propose some variable-transformation methods applicable to CUSUM control charts in non-normal process.