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Details van artikel 10 van 14 gevonden artikelen
| Titel: |
Statistical properties of the lsi multivariate control chart |
| Auteur: |
Aparisi, Francisco Jabaioyes, Jose Carrion, Andres |
| Verschenen in: |
Communications in statistics |
| Paginering: | Jaargang 28 (1999) nr. 11 pagina's 2671-2686 |
| Jaar: |
1999 |
| Inhoud: |
Recently there has been a growing interest in multivariate statistical process control in which the simultaneous control of several related quality characteristics is considered The detection of a shift in the in-controi mean vector [image omitted] has already been studied in depth assuming that the p variables to be controlled are distributed as a p-multivariate normal. However, very little attention has been paid to the detection of shifts in the dispersion of the variables, i. e., shifts in the in-control covariance matrix ∑,0. The use of a chart which consists of plotting values of the generalized variance, |S|, is recommended in the bibliography, but its statistical properties are not well known In this paper we shall study the distribution of |S| and we shall show how to obtain a suitable control limit. The power of the chart wiii be studied and we shall show that it only depends on |∑1|/|∑0| where ∑1 is the out-of-control covariance matrix. |
| Uitgever: |
Taylor & Francis |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 10 van 14 gevonden artikelen
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