TY - JOUR
T1 - Hotelling's T2 control chart with variable sampling intervals
AU - Aparisi, Francisco
AU - Haro, Cesar L.
PY - 2001/9/20
Y1 - 2001/9/20
N2 - Hotelling's T2 chart is the most widely used multivariate procedure to control changes in the mean vector of p correlated quality characteristics. In this paper, it is shown how to increase the efficiency of the test using the variable sampling interval technique. Given a control scheme with constant size and frequency of sampling, tables are produced that give a scheme, with two possible periods of time between samples, that is equivalent to the standard procedure when the process is in control. However, the new chart, as it uses two possible intervals between samples, is faster in detecting a change in the process. Various alternatives are given for the possible users of this method.
AB - Hotelling's T2 chart is the most widely used multivariate procedure to control changes in the mean vector of p correlated quality characteristics. In this paper, it is shown how to increase the efficiency of the test using the variable sampling interval technique. Given a control scheme with constant size and frequency of sampling, tables are produced that give a scheme, with two possible periods of time between samples, that is equivalent to the standard procedure when the process is in control. However, the new chart, as it uses two possible intervals between samples, is faster in detecting a change in the process. Various alternatives are given for the possible users of this method.
UR - http://www.scopus.com/inward/record.url?scp=0035922489&partnerID=8YFLogxK
U2 - 10.1080/00207540110054597
DO - 10.1080/00207540110054597
M3 - Article
AN - SCOPUS:0035922489
SN - 0020-7543
VL - 39
SP - 3127
EP - 3140
JO - International Journal of Production Research
JF - International Journal of Production Research
IS - 14
ER -