General MIL-SPEC test environments are specified for life testing.
Alarms: Test engineers have not compared MIL-SPEC environments to mission profile environments.
Escapes: Base life test environments on mission environmental profiles.
Benefits: Maintenance and support planning will be more
Life test is performed in production phase.
Alarms: Life test resources are limited due to production commitments; design is frozen for production before life test results are available.
Escapes: Schedule adequate life test no later than EMD, to establish life characteristics prior to final design release.
Benefits: Design will be
optimum for mission needs.
Analyses of life characteristics planned using available data.
Alarms: Only in-house data is used; all potential failure mechanisms are not considered..
Escapes: Analyze aging characteristics data from all potential sources to identify risk areas and develop a comprehensive life test program.
Benefits: Cost-effective approach to estimating life by
analyses and testing will be developed.
Accelerated life testing is used to the maximum extent possible.
Alarms: Unverified acceleration factors are used to shorten the life test program.
Escapes: Use only proven, well-understood accelerated testing techniques.
Benefits: Weapon system aging characteristics will be realistically simulated.
"Manufacturing Plan"Best Practices: How to Avoid Surprises in the World's Most Complicated Technical Process. Department of the Navy; Reliability, Maintainability, and Quality Assurance Directorate (NAVSO P-6071), March 1986,pp. 5-31 to 5-35.