Artículos de revistas
X̄ chart with variable sample size and sampling intervals
Date
1997-04-01Registration in:
Journal of Quality Technology, v. 29, n. 2, p. 197-204, 1997.
0022-4065
2-s2.0-0031118181
Author
Universidade Estadual Paulista (UNESP)
Department of Production
ASQC
Institutions
Abstract
Recent theoretical studies have shown that the X̄ chart with variable sampling intervals (VSI) and the X̄ chart with variable sample size (VSS) are quicker than the traditional X̄ chart in detecting shifts in the process. This article considers the X̄ chart with variable sample size and sampling intervals (VSSI). It is assumed that the amount of time the process remains in control has exponential distribution. The properties of the VSSI X̄ chart are obtained using Markov chains. The VSSI X̄ chart is even quicker than the VSI or VSS X̄ charts in detecting moderate shifts in the process.
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