Abstract. Component-based software engineering proposes building complex applications from COTS (Commercial Off-The-Shelf) organized into component markets. Therefore, the main development effort is required in selection of the components that fit the specific needs of an application. In this article, we propose a mechanism allowing the automatic selection of a component among a set of candidate COTS, according to functional and non-functional properties. This mechanism has been validated on an example using the ComponentSource component market.

One of Software Engineering's main goals is to build complex applications in a simple way. For that, software components must be described by its functional and non-functional properties. Then, the problem is to know which component satisfies a specific need in a specific composition context, during software conception or maintenance. We state that this is a substitution problem in any of the two cases. From this statement, we propose a need-aware substitution model that takes into account functional and non-functional properties.

One of Software Engineering's main goals is to build complex applications in a simple way. For that, software components must be described by their functional and non-functional properties. Then, the problem is to know which component satisfies a specific need in a specific composition context, during software development or evolution. We claim that this is a problem of substitution, and we propose a need-aware substitution model that takes into account functional and non-functional properties.

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