Patent ID: 7477955

Claim:
An optimum shape design method characterized in that, while a mechanical response amount including at least one of the maximum deceleration and the maximum displacement generated in contents in drop impact and creep displacement generated in long-term use of a cushioning material is detected with respect to a cushioning material shape defined as cushioning material CAD data produced based on design data of said cushioning material used in cushioning packaging, manufacturing decision for said cushioning material shape defined as the CAD data is detected, a correlation among said cushioning material CAD data, said mechanical response amount, and said manufacturing decision is detected, said cushioning material CAD data is changed until an optimum shape of said cushioning material is detected based on said correlation, said mechanical response amount satisfying design conditions of said cushioning material and said cushioning material being producible in the optimum shape, and the correlation among said cushioning material CAD data, said mechanical response amount, and said manufacturing decision is updated based on said changed cushioning material CAD data, and the optimum shape of said cushioning material is detected based on the updated correlation, said mechanical response amount satisfying design conditions of said cushioning material and said cushioning material being producible in the optimum shape.