### Efficiency

A ratio of output (or performance or success) to the input(s) (or costs) involved, over a specified time and in a specified context.

### Efficiency

[basketball] In professional basketball, the most commonly used statistical benchmark for comparing the overall value of players is called efficiency. It is a composite basketball statistic that is derived from basic individual statistics: points, rebounds, assists, steals, blocks, turnovers and shot attempts. The efficiency stat, in theory...

### Efficiency

[statistics] In statistics, efficiency is a term used in the comparison of various statistical procedures and, in particular, it refers to a measure of the optimality of an estimator, of an experimental design{sfn|Everitt|2002|loc=p. 128} or of a hypothesis testing procedure. Essentially, a more efficient estimator, experiment or test needs...
Found on http://en.wikipedia.org/wiki/Efficiency_(statistics)

### Efficiency

Reflects the amount of wasted energy.
Found on http://www.encyclo.co.uk/local/20047

### efficiency

[n] - the ratio of the output to the input of any system 2. [n] - skillfulness in avoiding wasted time and effort
Found on http://www.webdictionary.co.uk/definition.php?query=efficiency

### Efficiency

[pronounce: ef-fish-en-see] A way of saying how much energy something wastes.
Found on http://www.encyclo.co.uk/local/20442

### Efficiency

The acoustic power delivered for a given electrical input. Often expressed as decibels/watt/meter (dB/w/m). ESL - Abbreviation for electrostatic loudspeaker.
Found on http://www.encyclo.co.uk/local/20447

### Efficiency

No machine can be 100% efficient. Efficiency is defined as 'Useful Energy Out' / 'Total Energy In'. It is a fraction, sometimes written as a percentage. For example, if an electric motor in a winch consumes 2000J of energy per second, and does 420J of useful work per second, then the efficiency of the winch is, eff = 420/2000 = 0.21 = 21%. Note th...
Found on http://www.users.zetnet.co.uk/computing/MainPage/SecDepts/Physics/Resources

### Efficiency

With loudspeakers, efficiency is generally the Sound Pressure Level (measured in Decibels) produced from a given watt of an amplifiers signal (dB's per Watt). A very efficient speaker can have a bigger influence on the SPL's produced by a system than the level of watts produced by the amplifier. A good rule of thumb is that a speaker that 3 dB's mo...

### Efficiency

Found on http://www.agbnielsen.net/glossary/glossaryQ.asp?type=alpha&jump=none

### Efficiency

A measure of how well a machine changes energy into useful energy.ObjectEfficiencyDry plate clutch (transmission efficiency)0.99Driveshaft joints (transmission efficiency)0.99Straight gears (transmission efficiency)0.95 to 0.98 See also: Energy.
Found on http://www.diracdelta.co.uk/science/source/e/f/efficiency/source.html

### efficiency

The ratio of work done or energy developed by a machine or engine, to the energy supplied to it.
Found on http://www.chemicalglossary.net/definition/635-Efficiency

### Efficiency

Swimming pool chemistry: The power to produce an effect. Chlorine's efficacy is affected by many factors, including the sun, water balance and the water's chlorine demand.
Found on http://www.1st-direct.com/acatalog/Chemical_Glossary.html

### Efficiency

The ratio of total output power to total input power, normally expressed as a percentage
Found on http://www.albacom.co.uk/Web/Site/defence/def_pow_glossary.html

### Efficiency

The method of describing how much of the power delivered to a system is available for use by the controlled device. For example, a motor/gearbox having a full working rating of 100A but requiring 10A to turn the gearbox would be said to be 90% efficient.
Found on http://www.encyclo.co.uk/local/20823

### efficiency

1. The quality of being efficient or producing an effect or effects; efficient power; effectual agency. 'The manner of this divine efficiency being far above us.' (Hooker) ... 2. <mechanics> The ratio of useful work to energy expended. Efficiency of a heat engine, the ratio of the work done an engine, to the work due to the heat supplied to i...
Found on http://www.encyclo.co.uk/local/20973

### efficiency

noun skillfulness in avoiding wasted time and effort; `she did the work with great efficiency`
Found on https://www.encyclo.co.uk/local/20974

### efficiency

Has several meanings. Sometimes used in a theoretical context as a synonym for Pareto efficiency. Below is the econometric/statistical definition. Efficiency is a criterion by which to compare unbiased estimators. For scalar parameters, one estimator is said to be more efficient than another if the first has smaller variance. For multivariate estim...
Found on http://www.econterms.com/glossary.cgi?query=efficiency

### Efficiency

The degree and speed with which a market accurately incorporates information into prices.
Found on http://www.duke.edu/~charvey/Classes/wpg/bfglose.htm

### Efficiency

• (n.) The quality of being efficient or producing an effect or effects; efficient power; effectual agency. • (n.) The ratio of useful work to energy expended.
Found on http://thinkexist.com/dictionary/meaning/efficiency/

### efficiency

(from the article `automobile`) The efficiency of an automobile engine is highest when the load on the engine is high and the throttle is nearly wide open. At moderate speeds on ... There are two features of the concentration profile important in determining the efficiency of a column and its subsequent ability to separate or ... ......
Found on http://www.britannica.com/eb/a-z/e/12

### efficiency

The amount of power output by a fluid power system compared to the amount of power input.
Found on https://www.encyclo.co.uk/local/21004

### Efficiency

See economic efficiency.
Found on http://www-personal.umich.edu/~alandear/glossary/e.html

### Efficiency

Ratio of its power output to its total power input
Found on https://www.encyclo.co.uk/local/21687

### Efficiency

(Lighting) A ratio of light emitted from a luminaire to the light produced by the bare lamp.
Found on http://www.youngco.com/young2.asp?ID=4&Type=3
No exact match found