Component Based Software Engineering (CBSE) exploits re-usability of configurable components to generate software products more quickly, and with higher quality. CBSE offers potential advantages for performance engineering. If most of a new system consists of existing software components, it should be possible to predict properties like performance more easily, than if all of the software is new. The performance-sensitive properties of the components can be extracted and stored in a library, and used to build a predictive model for the performance of a proposed product. This paper describes an approach based on performance submodels for each component, and a system assembly model to describe the binding together of library components and new components into a product. In this work a component can be arbitrarily complex, including a subsystem of concurrent processes. The description pays particular attention to identifying the information that must be provided with the components, and with the bindings, and to providing for parameterization to describe different configurations and workloads. General Terms Performance
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