关键词: 决策分析，时间片影响图，离散事件系统仿真，动态随机影响图，模型规范，迭代解算

Abstract: As an expanded mode of Influence Diagrams,the himcSliced IDs (TSIDs,or Dynamic IDs) increases cause effect relationship description capability effectively for decision analysis. But it still can't becomingly describe intercurrent, alternating, or coordinated processes of complex system. Based on the analysis of discrete-event system model, the paper suggested a Dynami}stochastic IDs (DSIDs) by introducing a time node to expand existing model-criterion, explicated its graphical syntax,and gave its evaluating algorithm The DS)Ds could be used as an effected approach to improve existing himcSliced IDs to describe complex processes.

Key words: Decision analysis, Time-sliced influence diagrams, Discrete-event system simulation, Dynami}stochastic in flucnce diagrams, Model-criterion, Model evaluating