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Figure of merit - Wikipedia, the free encyclopedia

Figure of merit

From Wikipedia, the free encyclopedia

A Figure of merit is a quantity used to characterize the performance of a device relative to other devices of the same type. In engineering, figures of merit are often defined for particular materials or devices in order to determine their relative utility for an application. In commerce, such figures are often used as a marketing tool to convince consumers to choose a particular brand.

[edit] Examples

[edit] Deception

A number quoted as a figure of merit may not be enough to determine performance when comparing products, yet consumers may solely depend on this number for selection. For example, when purchasing a laptop a consumer could choose based on the capacity of its hard drive. The rpm, cache, and seek times may not be notated, but significantly affect performance.

Another example is the megapixel count on digital cameras. The average consumer does not realize that the number of pixels on a sensor is only one indication of the quality of the image that is captured. In particular, more pixels can be squeezed onto the same-size sensor, which means a degradation of quality because the pixels are necessarily smaller.


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