关键词: 个人协同代理, 关键路径法, 计算机支持的协同工作, 协作元, 招投标模型, 矿用液压挖掘机，回转系统，闭式液压回路，制动能耗

Abstract: The organization, optimization and dynamical control of design assignments are key issues of product cooperative design. Existing methods for product cooperative design focus on the disposing of business process. They do not take into account the optimum way of distributing subtasks in design. An idea of “collaboration cell” is presented which is made up of designer, personnel cooperative agent(PCA gent) and design tools. A model of invitation and bid is put forward to reasonably deploy subtasks in product design based on PCAgent and task bulletin board, with the decision-making bid in PCAgent and the definition of Ability operator, Famine operator and Importance operator. The ”key path” method is also presented to control and optimize the period of design, which can inspect whether the task is reasonably distributed into subtasks or not. The experiment in engineering indicates the rationality and validity of all methods which provide the clearly theoretical foundation for the organization, optimization, deployment and control of all design assignments, and obviously improve the product cooperative design.

Key words: Collaboration cell, CSCW, Invite and bid, Key path, PCAgent, Hydraulic shovel, swing system, closed hydraulic circuit, braking energy