Electric circuit evaluation method

An electric circuit evaluation method comprising the following steps:

• a step for finding an arriving current frequency property representing a current reaching a predetermined portion of a designated electric circuit when a predetermined immunity test is performed on a to-be-measured circuit unit including the designated electric circuit, the arriving current frequency property being found through a simulation on the basis of on an equivalent circuit of the designated electric circuit and an equivalent circuit of the to-be-measured circuit unit;
• and
• a step for finding an arriving voltage frequency property representing a voltage arriving between predetermined points of the designated electric circuit when the immunity test is performed, the arriving voltage frequency property being found through a simulation on the basis of on the equivalent circuit of the designated electric circuit and the equivalent circuit of the to-be-measured circuit unit.

An electric circuit provided together with the following data:

• data pertaining to a malfunction current frequency property, in which the magnitude of a critical noise signal at which the electric circuit causes a malfunction is represented by a current flowing to a predetermined portion of the electric circuit, and data pertaining to a malfunction voltage frequency property, in which the magnitude of a critical noise signal at which the electric circuit causes a malfunction is represented by a voltage occurring between predetermined points of the electric circuit.