Abstract: A power estimation method includes acquiring power values consumed by a power estimation target apparatus, each of the power values corresponding to a plurality of parameters; calculating magnitude of variation in the power values in relation to a mean thereof; creating, when the magnitude of variation is less than a first value, a first power prediction formula approximating power consumption of the power estimation target apparatus by a constant which is the mean; calculating a degree of influence of each of the parameters on the power consumption when the magnitude of variation is the first value or more; creating, by reducing the number of the parameters based on the degree of influence, a second power prediction formula approximating the power consumption by a linear equation; and estimating the power consumption using one of the first and the second power prediction formulae.

Abstract: In a power estimator, a power coefficient-calculating section acquires an average value of the number of signal changes per unit time in each circuit range to thereby calculate a power coefficient for each circuit range or calculate a power coefficient for each circuit range when the average value of the number of signal changes per unit time is equal to 1, a correction coefficient-calculating section calculates a ratio of an average value of the number of signal changes per unit time at signal lines included in the circuit range to an average value of the number of signal changes per unit time at observing points designated in the circuit range, as a correction coefficient, and a power value-calculating section calculates a power value for each circuit range based on the correction coefficient and the power coefficient calculated for each circuit range.

Abstract: In a power estimator, a power coefficient-calculating section acquires an average value of the number of signal changes per unit time in each circuit range to thereby calculate a power coefficient for each circuit range or calculate a power coefficient for each circuit range when the average value of the number of signal changes per unit time is equal to 1, a correction coefficient-calculating section calculates a ratio of an average value of the number of signal changes per unit time at signal lines included in the circuit range to an average value of the number of signal changes per unit time at observing points designated in the circuit range, as a correction coefficient, and a power value-calculating section calculates a power value for each circuit range based on the correction coefficient and the power coefficient calculated for each circuit range.