Publicações > Artigos em Revistas Internacionais

Combined CUSUM-Shewhart schemes for binomial data

Morais, M. C. ; Pacheco, António

Economic Quality Control, 21(1) (2006), 43-57$002fj$002feqc.2006.21.issue-1$002feqc.2006.43$002feqc.2006.43.pdf/eqc.2006.43.pdf?t:ac=j$002feqc.2006.21.issue-1$002feqc.2006.43$002feqc.2006.43.xml

The detection of upward shifts in a process parameter using a CUSUM scheme can be improved by using an upper one-sided combined CUSUM–Shewhart scheme. Considerable advantage is to be gained since combined schemes take advantage of two well known facts: the Shewhart schemes behave well in case of a large shift, while CUSUM schemes allow a fast detection of small and moderate shifts. Having this in mind, upper one-sided combined CUSUM–Shewhart schemes for binomial data are discussed in detail in this paper. Numerical comparisons between upper one-sided combined CUSUM–Shewhart schemes and upper onesided CUSUM schemes with a 50% head start are also carried out, leading to – what we believe – surprising results.