关键词: 云模型, 蚁群算法, 协同设计, 信度

Abstract: By studying the mission needs and the previously actual collaborative design capacity of Agent，that is，the commitments made during the mission carrying out and the real pay，the pay/commitment relationship to get the reliability degree of the collaborative capacity.Using the ant colony algorithm，which is improved by the cloud model combined with the optimal tree to analyze the reliability degree can restrict the traditional ant colony algorithm trapped into local optimal solution effectively.This improved algorithm has been applied to the personnel selection of collaborative design.Authors find that this algorithm can not only provide decision making support for design manager，but also match the design staff better.Further more，it can make the whole design orderly and stable and can achieve its optimal function.All of these would provide support for the new projects’ carrying out.

Key words: cloud models, Ant Colony Algorithm, computer supported cooperative design, reliability degree