Earticle

초록

영어

Even though the ad hoc Shewhart methods remain controversial due to various mathematical flaws, there is little disagreement among researchers and practitioners when a set of process data has a skewness distribution. In the context and language of process control, the error related to the process data shows that time to signal increases when a control parameter shifts to a skewness direction. In real-world industrial settings, however, quality practitioners often need to consider a skewness distribution. To address this situation, we developed an enhanced design method to utilize advantages of the traditional attribute control chart and to overcome its associated shortcomings. The proposed design method minimizes bias, i.e., an average time to signal for the shift of process from the target value (ATS) curve, as well as it applies a variable sampling interval (VSI) method to an attribute control chart for detecting a process shift efficiently. The results of the factorial experiment obtained by various parameter circumstances show that the VSI c control chart using nearly unbiased ATS design provides the smallest decreasing rate in ATS among other charts for all experimental cases.

목차

Abstract
 1. 서론
 2. 연구동향 및 이론적 고찰
  2.1 연구동향
  2.2 c 관리도의 근사비편향 ARL 설계
  2.3 VSI 관리도
 3. VSI c 관리도의 근사 비편향 ATS 설계
 4. 수치실험
  4.1 수행도평가
  4.2 비편향성 평가
 5. 결론
 6. 참고문헌

키워드

저자

• 박주영 [ Park Joo Young | 울산과학대학 산업경영과 ]

참고문헌

발행기관

간행물

표지보기 관심저널 등록

• 간행물명

  대한안전경영과학회지 [Journal of Korea Safety Management & Science]

• 간기

  계간

• pISSN

  1229-6783

• eISSN

  2288-1484

• 수록기간

  1999~2025

• 십진분류

  KDC 530 DDC 620