Detecting Changes in Field Reliability Using Data from a Complex Factory Screen

New products are sometimes screened in the factory before shipment to the field. We show how to use failure time data from one of these screens to predict early field reliability. These reliability predictions are more economical and timely than reliability estimates that wait for data from field tr...

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Bibliographic Details
Published in:Quality engineering 2004-12, Vol.17 (1), p.67-75
Main Authors: León, Ramón V., David Clark, W.
Format: Article
Language:English
Subjects:
delta method
Estimating techniques
maximum likelihood estimation
Predictions
Process controls
Product development
Reliability engineering
reliability estimation
Statistical process control
Studies
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Summary:New products are sometimes screened in the factory before shipment to the field. We show how to use failure time data from one of these screens to predict early field reliability. These reliability predictions are more economical and timely than reliability estimates that wait for data from field tracking studies. Further, these predictions are continuously responsive to the changes in reliability that frequently occur during the manufacture of a new product, and therefore, can form the basis of a rapid-feedback system for manufacturing process control.
ISSN:0898-2112
1532-4222
DOI:10.1081/QEN-200028693