Using percentage Nonconforming to evaluate Non-Normal Process Capability: Gamma Distributions

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Journal of Korean Society for Quality Management > Volume 27(1); 1999 > Article

Journal of Korean Society for Quality Management 1999;27(1): 18-.

불량률의 측도로 비정규 공정능력의 평가: Gamma 분포

김홍준¹, 김진수², 송서일³

¹대구산업정보대학 산업안전과
²대전산업대학교 산업공학과
³동아대학교 산업공학과

Using percentage Nonconforming to evaluate Non-Normal Process Capability: Gamma Distributions

ABSTRACT

This paper is a brief review of the different procedures that are available for fitting theoretical distributions to data. The use of each technique Is illustrated by reference to a distribution system which including the Pearson, Johnson and Burr functions. These functions can be used to calculate percent out of specification. Therefore, in this paper a new method for estimating a measure of process capability for Gamma distributed variable data proposed using the percentage nonconforming. Process capability indices combines with the percentage nonconforming Information can be used to evaluate more accurately process capability.