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thesis. Any person(s) intending to use a part or the whole of the materials in this thesis in a proposed publication must seek copyright release from the Dean of the Graduate School. In this thesis, we address quality assurance issues in component-based software development. First, we propose a quality assurance (QA) model for component-based software development (CBSD), which covers eight main processes in CBSD: component requirement analysis, component development, component certification, component customization, and system architecture design, integration, testing, and maintenance. We propose the Component-based Program Analysis and Reliability Evaluation (ComPARE) environment for evaluation of quality of component-based software systems. ComPARE automates the collection of different metrics, the selection of different prediction models, the formulation of user-defined models, and the validation of the established models according to fault data collected in the development process. Different from other existing tools, ComPARE takes dynami