Abstract: By analyzing the inheritance relationships of the size and the shape feature of the
profiles, and the structure variation of profile model, the idea of genetic engineering is used in the
development and design of product family, and the profile feature is taken as the DNA of the
product structure information. The propagation of the profile feature, as information streams, in
product tree is revealed referenced to the principle of genetic engineering of biology. On this
basis, a method of gene coding and gene recombination for product based on the idea of genetic
engineering is provided. By discussing the concept of product family and product gene DNA and
the connotation and the research contents of the designing of product family DNA, the key
support technologies of genetic engineering are pointed out. To take the door profile’s structural
for an example, the result shows the designing effect on the idea of genetic engineering of the
product family.

Key words: product family design, gene encoding, DNA, door profile, genetic engineering idea