Ls. Zimmer et al., EVALUATION OF A 3-STATE ADAPTIVE SAMPLE-SIZE (X)OVER-BAR CONTROL CHART, International Journal of Production Research, 36(3), 1998, pp. 733-743
Citations number
12
Categorie Soggetti
Engineering,"Operatione Research & Management Science
A three-state adaptive sample size control chart is developed and its
performance is compared with the standard Shewhart control chart and a
two-state adaptive sample size control chart. In general, significant
improvements in shift detection capability results from using an adap
tive sample size control chart, and the three-state adaptive control c
hart is superior to the two-state adaptive control for small shifts in
the process mean. The improvements found in the two-state and three-s
tate adaptive control chart schemes are gained without increasing the
average in-control sample size over the standard non-adaptive Shewhart
control chart. The three-state procedure is only slightly better than
the two-state scheme, and so the two-state scheme is likely adequate
in most applications. The three process monitoring techniques are comp
ared using both steady-state and start-up cases.