The article presents a Bayesian analysis for the environmental stress
screening problem. The decision problem of deriving optimal stress scr
een durations is solved. Given a screen duration, the optimal stress l
evel can also be determined. Indicators of the quality of a screen of
any duration are derived. A statistical model is presented which allow
s a posterior density for the rate of early failures of the production
process to be calculated. This enables the user to update his opinion
about the quality of the process. (C) 1994 John Wiley & Sons, Inc.