关键词: 零件重用, 尺寸冲突延迟, 尺寸变化概率, 概率分配, 变型设计, 大规模定制

Abstract: Aiming at the dimension constraint conflict problem caused by part instance reuse during product variant design process，dimension conflict delayed method by assigning dimension variant requirement among corresponding input dimensions was presented.The product variety and parametric variant design were analyzed，and a variant design approach by combining part master model reuse and part instance reuse was proposed.The forms of dimension constraint conflict resulting from part instance reusing were studied.Dimension constraint network was defined with 5-tuple，and a rework probability matrix among dimensions was also constructed.On these basis，a dimension variant requirement transferring and postpone strategy was put forward，and the probability assignment model of dimension variant was formulated based on heuristic function.The decision-making model of dimension conflict by taking part as application was established with the goal of aggregating variant requirement into few parts.A case study was used to verify the proposed methods and principles.

Key words: part reusing, dimension conflict postponing, dimension variant probability, probability assignment, variant design, mass customization