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.

Abstract
 1. 서론
 2. 누적합 관리도의 고찰
 3. 유관 논문 조사 방법
 4. 누적합 관리도의 연구 동향 분석
  4.1 누적합 관리도의 이론적 배경
  4.2 누적합 관리도의 변형에 관한 연구
  4.3 누적합 관리도를 설계하기 위한 접근방법
  4.4 누적합 관리도의 관리모수에 관한 연구
  4.5 다변량(multivariate) 누적합 관리도에 대한 연구
 5. 존슨의 변수변환방법
  5.1 변환방법
  5.2 존슨분포
  5.3 존슨변환(Johnson Transformation)
 6. 결론
 7. 참고문헌

• 김종걸
• 엄상준
• 최성원