Quality control system for manufacturing industrial products

Details Quality control system for manufacturing industrial products Quality control system for manufacturing industrial products

2007-04-24

2007-04-24

Barlow, John (Department: 2863)

Data processing: measuring, calibrating, or testing

Measurement system in a specific environment

Quality evaluation

C700S109000

Reexamination Certificate

active

11171394

ABSTRACT:
In a quality control system for manufacturing industrial products, the product quality history and the manufacturing process history are collected and collated to calculate the correlation magnitude between the two histories. The candidates for the cause of quality variation hidden in the manufacturing processes are listed, and the correlation magnitude between all combinations of the variates of the manufacturing process history are calculated. Further, by utilizing the manufacturing sequence history used for an input plan, a causation connecting structure model between the manufacturing processes of the manufacturing line is automatically generated and automatically analyzed thereby to automatically extract the fundamental cause of quality variation from the candidates for the cause of quality variation. By doing so, the cause of quality variation of industrial products manufactured through a complicated process can be traced in a complicated connecting structure in the manufacturing history data.

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“Chemometrics, Data Analysis for the Laboratory and Chemical Plant”, Wiley (2003), pp. 412-415.
“Graphical Models” Oxford University Press (1996), Steffen L. Lauritzen, p. 1 and pp. 123-157.

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