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Method for monitoring multivariate processes

  • US 5,949,678 A
  • Filed: 10/16/1996
  • Issued: 09/07/1999
  • Est. Priority Date: 12/22/1993
  • Status: Expired due to Term
First Claim
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1. A method for monitoring a multivariate process comprising the steps of:

  • registering measured values of variables associated with said multivariate process as an observation at a predetermined time;

    describing the variables as a multidimensional space, wherein each variable represents one dimension in the space;

    representing each observation as a point in the multidimensional space, whereby a series of observations carried out at different times will be represented by a point cluster in space;

    calculating for the point cluster at least one first and one second principal directions in space;

    determining projections of the observations onto the first and second principal directions, whereby a model of the multivariate process is obtained;

    updating during the course of the multivariate process the first and second principal directions of the point cluster in space, whereby the model of the multivariate process is dynamically adapted to the multivariate process in real time.

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