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A Change Point Approach for Phase I Analysis in Multistage Processes

Summary: [This abstract is based on the authors' abstract.] A phase I analysis of a multistage process is described in which the input of the process stage under study may be closely related to the outputs of earlier stages. The focus of the study is the problem of testing and estimating the change pointing in a phase I reference sample. An approach is proposed that combines the binary segmentation procedure and the multivariate two-sample test. The approach incorporates the directional information based on the multistage state-space model for testing the stability of multistage processes.

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  • Topics: Process Management
  • Keywords: Likelihood methods, Statistical process control (SPC), Process analysis, Input/Output Analysis
  • Author: Zou, Changliang; Tsung, Fugee; Liu, Yukun
  • Journal: Technometrics