Efficiency is the extent to which time or effort is well used for the intended task or purpose.
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 (computer science), related to the amount of computational resources used by the algorithm 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 Knot efficiency, the relative knot strength
See also Efficient (horse) (foaled 2003), a New Zealand Thoroughbred racehorse Effectiveness Inefficiency (disambiguation) Energy efficiency (disambiguation)