Abstract: Industrialized development of software is one of the most interesting but difficult research fields in software engineering. This article discusses the most important problems:component models and component composition. Investigating representative component models, this paper proposes a new component model. Based on this model, it brings forward a new concept:the virtual component. A development model with virtual components is explained in the end.

Key words: component composition, virtual component, component model, software architecture, VCBSD