cal and defense communities, explore their relevance for DoD application.


The issue chosen for this first workshop was statistical methods for assessment of the reliability (including availability and maintainability) of defense systems. A list of potential topics for the workshop evolved from issues raised in Chapter 7 of the above-referenced NRC (1998) report; discussions with the sponsors identified other topics that are a high priority for DoD but were not specifically addressed in that report. Further discussions of the Committee on National Statistics subcommittee responsible for organizing the workshop narrowed these topics down to seven that were selected for focus: (1) global reliability test designs to direct defense system development; (2) recent developments in reliability growth modeling; (3) use of statistical modeling for combining information, with applications to developmental and operational testing; (4) methods for estimating reliability from field performance data; (5) modeling of fatigue; (6) reliability of software-intensive systems; and (7) assessment of life-cycle costs through the use of reliability analyses (see the Appendix for the workshop agenda).

For each topic, two speakers from either academia or industry were identified to provide presentations. In addition, one or more defense specialists with responsibilities directly relevant to each topic were identified. These individuals were asked to interact with the (nondefense) presenters in advance of the workshop to ensure that the presentations would reflect cognizance of the specific problems faced by DoD; the current methods used by DoD to address these problems; and the important, possibly unique, constraints under which DoD operates. They were also asked to serve as discussants for the relevant workshop session.

The Workshop on Reliability Issues for DoD Systems, held June 9-10, 2000, had multiple goals, partly because some of the described techniques are mature, while others are still undergoing active research. In addition, the intended audience for the workshop and this report comprises defense reliability experts, higher-level administrators who could help change the processes used in system development, and defense employees charged with the day-to-day responsibility of assessing the reliability of defense systems. With respect to this last segment of the intended audience, an important consideration for the workshop to address was how to communicate the more readily applied and broadly applicable techniques to those in the DoD

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