Y. Cai and D. Martinelli
Conceptual Design is a preliminary stage of system design. It involves feasibility study, system specification, decision making and primary design. As system design projects become large, a muitidisciplinary approach is necessary to accomplish the task. An important activity of the cooperative conceptual design is concept negotiation. In this recursive process, design members evaluate and integrate the proposed design concepts from different perspectives until the design objective and constraints arc satisfied.