In the designing process, the cooperate working mechanism in designing layout is mainly using sequence diagram and state diagram, and guarantees the consistency by retreating the no-response message and distributing storage of layout information. 在系统的设计过程中,主要利用顺序图和状态图来描述了版面设计过程中的协同工作机制,通过未响应消息序列的再处理及版面数据的分布式存储来保证版面数据的一致性。