Patent ID: 8577920

Claim:
A design method by computer comprising: an attribute searching operation searching for a design subject having similar attribute information similar to attribute information on a design subject designed in the past and histories of descriptions of improvements based on input information on the design subject; an improved part obtaining operation obtaining a description of an improvement on the searched design subject having the similar attribute information from the histories; an attribute calculation operation performing an operation on the similar attribute information of the design subject and obtaining a design subject having the description of an improvement of which has an effect of the improvement; and an output operation outputting improved input information, wherein the improved part obtaining operation obtains the attribute information contributing to the improvement of the design subject, reflects the attribute information in the input information and stores the history of the improved input information based on the operation result of the attribute calculation operation, and wherein the attribute calculation operation sorts design subjects having similar attribute information in a decreasing order of the degree of effect of improvements corresponding to the descriptions of the improvements by performing an operation on the attribute information of the design subjects.