What is "metrics"?

讀計組時用英漢字典查了metrics這個字。出現的卻是:

metrics

韻律學; 作詩法 [google]

只好去查wikipedia:

Metrics

Metrics are a system of parameters or ways of quantitative assessment of a process that is to be measured, along with the processes to carry out such measurement. Metrics define what is to be measured. Metrics are usually specialized by the subject area, in which case they are valid only within certain domain and cannot be directly benchmarked or interpreted outside it. Generic metrics, however, can be aggregated across subject areas or business units of an enterprise.

Metrics are used in several business models including CMMI. These measurements or metrics can be used to track trends, productivity, resources and much more. Typically, the metrics tracked are key performance indicators.