Abstract: Aiming at the problem of current component assembly projects selection technology, an approach to component composition selection based on QoS optimization which is mainly oriented large and complex enterprise software and application system configuration management was proposed. The essence of this approach is that the problem of component composition projects selection is transformed into a problem of multi-objective optimization with constraints.A genetic algorithm based on vector encoding scheme was presented for component composition projects selection. The vector encoding scheme can easily express the connection relationships between interfaces in the component composition model,which can't be expressed in other encoding schemes. Finally, experiments results show the feasibility and efficiency.

Key words: Component composition, Quality of service(Qos) , Genctic algorithm, Vector encoding