A data row of delay time ratio coefficient (hereinafter referred to as DMAG value) is selected from a delay information library (D2) (S4) for every circuit cell in a use condition range of a logic circuit, and the minimum value or/and maximum value of a DMAG value is extracted (S5). The minimum value...http://www.google.com/patents/US8073670?utm_source=gb-gplus-sharePatent US8073670 - Method for calculating delay time, program for calculating delay time and device for calculating delay time
