Abstract: Based on analyzing the connotation of product structure, the concept of the product lifecycle model having three dimensions including time, data and granularity is put forward. It expresses the full information of product lifecycle actions. The formalization definitions of the nodes, the nodes attributes, their relationship and the structural subtree are given. The operation methods of the nodes and nodes attributes are given. The operation rules and the transformation steps between model subtrees are described. The product lifecycle modelling process is illustrated from the product requirement structural subtree to the product scrap structural subtree by a demonstration.

Key words: Product lifecycle Structural model, Product model