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将基于分级规划的工艺决策子任务分解与求解策略、推理策略、知识管理策略与黑板推理方法中的多任务协同工作原理相结合，构造了基于分级规划与黑板推理的工艺决策模型．系统在进行工艺决策时，根据领域黑板上的零件信息与其他工艺决策初始化信息，通过总控模块和控制黑板的控制，依次调用与各子任务相关的工艺决策规则、数据和函数对各子任务进行求解或推理，并将推理结果依次填入领域黑板或环境黑板，直至各子任务全部执行完为止，环境黑板上所记录的即是当前零件的工艺设计结果．
The process decision-making sub-task decomposition and solution strategy, reasoning strategy, knowledge management strategy and blackboard reasoning method based on hierarchical programming are combined to work together to create a process decision model based on hierarchical programming and blackboard reasoning. System in the process of decision-making, according to the blackboard parts information and other process decision-making initialization information, through the control module and the control of the blackboard, and then call the sub-task process decision rules, data and functions for each sub-task Solving or reasoning, and inference results were filled in the field of blackboard or environmental blackboard, until all the sub-tasks are completed, the environmental blackboard is recorded on the current part of the process design results.