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A metric is a standard unit of measure, such as meter or mile
Mile

A mile is a Units of measurement of length, usually used to measure distance, in a number of different systems. In contemporary English contexts, mile most commonly refers to the statute mile of 5,280 Feet or the nautical mile of 1,852 meters ....
 for length, or gram
Gram

The gram , ; symbol g, is a Physical unit of mass.Originally defined as "the absolute weight of a volume of pure water equal to the cube of the hundredth part of a metre, and at the temperature of melting ice" , a gram is now defined as one one-thousandth of the SI base unit, the kilogram, or Scientific notation kg, which itself is...
 or ton
Ton

Units of massThere are several similar units of mass or volume called the ton:Others*The long ton is used for petroleum products such as aviation fuel....
 for weight, or more generally, part of a system of parameters, or systems of measurement
Systems of measurement

A system of measurement is a set of units which can be used to specify anything which can be measured and were historically important, regulated and defined because of trade and internal commerce....
, or a set of ways of quantitatively and periodically measuring, assessing, controlling or selecting a person, process, event, or institution, along with the procedures to carry out measurements and the procedures for the interpretation of the assessment in the light of previous or comparable assessments.

Metrics are usually specialized by the subject area, in which case they are valid only within a certain domain and cannot be directly benchmarked or interpreted outside it.






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A metric is a standard unit of measure, such as meter or mile
Mile

A mile is a Units of measurement of length, usually used to measure distance, in a number of different systems. In contemporary English contexts, mile most commonly refers to the statute mile of 5,280 Feet or the nautical mile of 1,852 meters ....
 for length, or gram
Gram

The gram , ; symbol g, is a Physical unit of mass.Originally defined as "the absolute weight of a volume of pure water equal to the cube of the hundredth part of a metre, and at the temperature of melting ice" , a gram is now defined as one one-thousandth of the SI base unit, the kilogram, or Scientific notation kg, which itself is...
 or ton
Ton

Units of massThere are several similar units of mass or volume called the ton:Others*The long ton is used for petroleum products such as aviation fuel....
 for weight, or more generally, part of a system of parameters, or systems of measurement
Systems of measurement

A system of measurement is a set of units which can be used to specify anything which can be measured and were historically important, regulated and defined because of trade and internal commerce....
, or a set of ways of quantitatively and periodically measuring, assessing, controlling or selecting a person, process, event, or institution, along with the procedures to carry out measurements and the procedures for the interpretation of the assessment in the light of previous or comparable assessments.

Metrics are usually specialized by the subject area, in which case they are valid only within a certain domain and cannot be directly benchmarked or interpreted outside it. This factor severely limits the applicability of metrics, for instance in comparing performance across domains. The prestige attached to them may be said to relate to a 'quantifiability fallacy', the erroneous belief that if a conclusion is reached by quantitative measurement, it must be vindicated, irrespective of what parameters or purpose the investigation is supposed to have.

In business, they are sometimes referred to as key performance indicators
Key performance indicators

Key Performance Indicators are financial and non-financial measures or metrics used to help an organization define and evaluate how successful it is, typically in terms of making progress towards its long-term organizational goals....
, such as overall equipment effectiveness
Overall equipment effectiveness

Overall equipment effectiveness is a hierarchy of metrics which focus on how effectively a manufacturing operation is utilized. The results are stated in a generic form which allows comparison between manufacturing units in differing industries....
, or key risk indicators. In the field of Facilities Management, a key metric is the Facility Condition Index
Facility Condition Index

The Facility Condition Index is used in Facilities Management to provide a benchmark to compare the relative condition of a group of facilities....
, or FCI
FCI

FCI is a three-letter abbreviation that can refer to:* Faculty of Computers and Information, the Egyptian faculties of computers and information...
.