Multivariate process control procedures based on simultaneous univariate control charts have been suggested by several author. These procedures are very sensitive to the direction of a process shift. We present a simple geometrical description of this directional sensitivity and quantify its effect. The advantages of control charts based on the principal components are noted.
|Original language||English (US)|
|Number of pages||6|
|Journal||Quality and Reliability Engineering International|
|State||Published - May 1997|
ASJC Scopus subject areas
- Safety, Risk, Reliability and Quality
- Management Science and Operations Research