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A Method for the Statistical Analysis of a Changeable Independent Variable in a Batch Process

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  • G. F. Koons
  • J. J. Geissler
  • B. Perlic

Abstract

A changeable independent variable is defined as one that assumes more than one level during an experimental trial or production run. When the values assumed by the variable are plotted against time, the resulting curve is called the profile of the variable. A statistical technique has been developed for assessing the effect of the profile of a changeable independent variable on process performance. The method is to represent the profile by a linear sum of orthogonal polynomials and to use their coefficients in the subsequent statistical analysis.

Suggested Citation

  • G. F. Koons & J. J. Geissler & B. Perlic, 1979. "A Method for the Statistical Analysis of a Changeable Independent Variable in a Batch Process," Journal of the Royal Statistical Society Series C, Royal Statistical Society, vol. 28(1), pages 47-54, March.
    • Handle: RePEc:bla:jorssc:v:28:y:1979:i:1:p:47-54
    DOI: 10.2307/2346810
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