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In the past two years, significant progress has been made in the application of ceramic-matrix composite materials to low heat rejection engine components. However, past R&D programs have identified a number of critical areas which require additional effort including: Life Prediction Methodology, Non-Destructive Testing, Design Methods, Data Base Development, and Verification of Design Rules. This paper discusses an integrated design methodology for addressing these research needs. The paper concludes with a specific example of a ceramic fiber-reinforced metal matrix composite piston which has been designed for application to advanced adiabatic engines.