Efficiency (disambiguation)
Efficiency is the extent to which time or effort is well used for the intended task or purpose.
| Look up efficiency in Wiktionary, the free dictionary. | 
Efficiency may also refer to:
- Efficiency (aerodynamics), the amount of lift divided by the aerodynamic drag
 - Efficiency (apartment), a one-room apartment
 - Efficiency (basketball), a statistical benchmark to compare the overall value of players
 - Efficiency (economics), a situation in which nothing can be improved without something else being hurt
- Efficiency (fair division), any changes made to assist one person would harm another
 
 - Efficiency (finance), non-mean-variance portfolio analysis, a way of showing that a portfolio is not efficient
 - Efficiency (mechanical)
 - Efficiency (network science), a measure of how efficiently a network exchanges information
 - Efficiency (statistics), a measure of quality of an estimator, experiment, or test
 - Energy efficiency (physics), the ratio of power consumed to useful power output
 
See also
    
- Efficient (horse) (foaled 2003), a New Zealand Thoroughbred racehorse
 - Effectiveness
 - Inefficiency
 - Energy efficiency (disambiguation)
 - All pages with titles containing Efficiency
 - All pages with titles containing Efficient
 
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