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A sequential hypothesis testing procedure for the process capability index C pk
Author(s) -
Scagliarini Michele
Publication year - 2018
Publication title -
quality and reliability engineering international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.913
H-Index - 62
eISSN - 1099-1638
pISSN - 0748-8017
DOI - 10.1002/qre.2290
Subject(s) - sequential analysis , sample size determination , sequential probability ratio test , process (computing) , statistical hypothesis testing , sample (material) , computer science , index (typography) , process capability index , statistics , mathematics , reliability engineering , engineering , work in process , chemistry , chromatography , operations management , operating system , world wide web
In this study, we propose a sequential method for hypothesis testing on the C pk process capability index. We compare the properties of the sequential test with the performances of nonsequential tests by performing an extensive simulation study. The results show that the proposed sequential test makes it possible to save a large amount of sample size as compared with the fixed sample size tests while maintaining the desired α ‐level and power.