To analyze the impact of change on Complex Product Design(CPD)tasks,an impact analysis model was proposed based on in-degree evolution laws.A model of Structure-Task Network(S-TN)in CPD was constructed to research on the mapping relations of design task variations caused by changes and in-degree variations in network.Based on the mechanism of growth,elimination and optimal connection,an Evolution model of S-TN(ES-TN)under the impacts of changes in CPD was constructed to analyze the in-degree evolving rules....