Quality variation display device, quality variation display...

Details Quality variation display device, quality variation display... Quality variation display device, quality variation display...

2007-12-04

2007-12-04

Nghiem, Michael P. (Department: 2863)

Data processing: measuring, calibrating, or testing

Measurement system in a specific environment

Quality evaluation

Reexamination Certificate

active

11311639

ABSTRACT:
A quality variation display device that can surely identify periodic information about quality on a product number basis such as the occurrence of a failure for every prescribed number of products is provided. The device includes a quality data storing database that stores the measurement result of each product measured by a measuring unit in association with the manufacturing order, an interval statistic calculation portion that shifts an interval corresponding to a prescribed number of products by a prescribed shift number of products, obtains a statistic for each of the intervals, and produces a graph representing the statistics in the manufacturing order at equal intervals, and a display portion that displays the graph.

REFERENCES:
patent: 6622101 (2003-09-01), Oechsner et al.
patent: 6801822 (2004-10-01), Fujiwara et al.
patent: 2003-295925 (2003-10-01), None

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