关键词: 知识流, 设计更改执行, 过程改进, 信息增益, 时序Petri网

Abstract: To improve the process efficiency of design change execution,the knowledge flow in the process of design change execution was researched by analyzing the transferring mechanism of knowledge.According to the discreteness,parallelism and temporality of activities in design change execution and the characteristic of knowledge which transformed its status between tacit and explicit,the timed Petri net model was adjusted.After the adjustment,a knowledge flow oriented process modeling method for design change execution named Knowledge Flow Oriented Timed Petri Nets (KFO-TPN) and a knowledge activity decomposition method for knowledge analysis were proposed.A process improvement model for design change execution was established.A key path recognition algorithm based on KFO-TPN model and a knowledge flow rationality analysis method based on semantic information gain and format information gain were proposed.The effectiveness of proposed methods was verified by taking the process improvement instance of design change execution within workshops of a research and development enterprise.

Key words: knowledge flow, design change execution, process improvement, information gain, timed Petri nets