Abstract This article is a comparative study between the parametric asymptotic lower confidence limits and bootstrap lower confidence limits for the basic quantile based process capability indices based on the unified super-structure {C_{N_{p}}(u,v)} when the distribution of the quality...

Abstract This paper deals with a new method of deriving the Process Capability Index (PCI) when the quality characteristic X follows a positively skewed distribution. The focus of the paper is to derive a new estimate of PCI by taking into account the {100(1-{\alpha})}   Confidence Intervals...

Abstract The process capability index (PCI), denoted by 𝐼, is a well-known characteristic in quality control analysis. Using Gini’s mean difference, we construct a new PCI, I_{G} say, assuming the two-parameter Weibull distribution (WD). In order to estimate the proposed I_{G} when the...