Abstract
Many actual multistage manufacturing processes are not serial structure, but parallel structure or hybrid struc- ture. The quality relationship model for multistage manufacturing process with parallel structure was developed based on state space model. The quality relationship model of multistage manufacturing process with hybrid structure was devel- oped via the hierarchical iteration method based on the models for the process with serial and parallel structures. The PLSR method was using for eliminating the correlation between quality characteristics to make analysis and identify the key quality characteristics. The method in the paper provides the solving basis for quality analysis and control in multi- stage manufacturing process.
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