Current component-oriented theory does not provide adequate support for information systems development. To say more precisely, it is forming. The main purpose of this paper is to discuss the attempts to combine classical enterprise information systems development methodologies with component-based approach. The paper advocates and argues for the use of component-based paradigm for the development of systems at all three layers of enterprise. It presents concepts and principles of this paradigm in enterprise engineering context. The integrated enterprise information system components, their structure and types are discussed and defined.