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A figure of merit is a quantity used to characterize the performance of a device, system or method, relative to its alternatives. In engineering, figures of merit are used as a marketing tool to convince consumers to choose a particular brand. ==Examples== *Clock rate of a CPU *Calories per serving *Contrast ratio of an LCD *Frequency response of a speaker *Fill factor of a solar cell *Resolution of the image sensor in a digital camera *Measure of the detection performance of a sonar system defined as the propagation loss for which a 50% detection probability is achieved *Noise figure of a radio receiver *The thermoelectric figure of merit, Z, a material constant proportional to the efficiency of a thermoelectric couple made with the material *The figure of merit of digital-to-analog converter (DAC) is calculated as (Power dissipation)/((2^ENOB) * Effective Bandwidth) (). *Luminous efficacy of lighting *Battery life of a laptop computer 〔(Decoding Battery Life For Laptops ) New York Times, June 25, 2009〕 *Heat absorption and transfer quality for a solar cooker. Benchmarks are synthetic figures of merit that summarize the speed of computers in performing various typical tasks. Benchmarks designed by a manufacturer generally rate the manufacturer's products more favorably than benchmarks designed by others or by independent benchmarkers. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「figure of merit」の詳細全文を読む スポンサード リンク
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