Spring 2009 Thursday, April 2   Speaker: Alyson Wilson Department of Statistics Iowa State University Title: Statistical Challenges from Science-Based Stockpile Stewardship Abstract: In this talk, I examine two problems that have arisen from my work in Science-Based Stockpile Stewardship (SBSS) with Los Alamos National Laboratory. The goal of SBSS is the assessment of safety and reliability in aging warheads in the absence of nuclear testing. As a statistician, this leads to complex problems in system reliability and test planning. As a first example, I present Bayesian networks and their use in system reliability assessment and develop a complete Bayesian solution for inference with multilevel data. As a second example, I present a Weibull reliability assurance test plan using hierarchical data.

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