Using warping information for batch process monitoring and fault classification

• The use of the warping information derived from synchronization in BMSPC is studied.
• New NOC-WICC control charts are useful to detect synchronization abnormalities.
• Proposals for supervised fault classification are a good complementary tool in BMSPC.

This paper discusses how to use the warping information obtained after batch synchronization for process monitoring and fault classification. The warping information can be used for i) building unsupervised control charts or ii) fault classification when a rich faulty batches database is available. Data from realistic simulations of a fermentation process of the Saccharomyces cerevisiae cultivation are used to illustrate the proposal.