A recording medium recording a program for a process, the process includes: calculating an amount of distortion in a via of a printed circuit board based on an expression using coefficient m, Δε={(L×α×Δt×E)/(D×T)}×m, where Δε is the amount of distortion, L is a length of the via, α is a thermal expansion coefficient of a base material, Δt is a temperature change of an environment, E is a Young's modulus, D is a diameter of the via, and T is a thickness of plating in the via; and calculating a lifetime of the via based on an expression, M=N/(n×365), where M is the lifetime of the via, n is a frequency of the temperature change, and N is the number of cycles of the lifetime satisfying an expression Nx=C/Δε.