efficiency
ih-FISH-en-see
/ɪˈfɪʃ.ən.si/
The state or quality of achieving maximum productivity with minimum wasted effort, time, or expense.
Focuses on minimizing input resources relative to output results.
The story behind the word. Originates from Latin 'efficere' (to accomplish, from 'ex-' out + 'facere' to make). During the 19th-century Industrial Revolution, steam engineers formalized 'efficiency' into a mathematical ratio of useful work performed over total energy expended.
Word relationships
- efficacy: Refers to the capacity to produce a desired effect, without regard to resource usage.
- streamlining: The active process of removing friction to achieve higher efficiency.
- inefficiency: The state of wasting time, energy, or resources.
- wastefulness: Careless expenditure without useful output.
Commonly confused with
- effectiveness: Effectiveness is doing the right task; efficiency is performing tasks with zero wasted resources.
Word family
- efficient (adjective): Achieving maximum productivity with minimum wasted effort.
- efficiently (adverb): In an efficient, non-wasteful manner.
Collocations
- energy efficiency
- operational efficiency
- improve efficiency
- fuel efficiency
Example sentences
- "Replacing old diesel buses with electric shuttles boosted transit efficiency while lowering operating costs." Public transport analysis
- "Installing smart insulation improved thermal efficiency, preventing heat loss throughout winter months." Building management report
Memory hook
E-FISH-ency: Think of an efficient fish gliding through water with ZERO wasted resistance. Maximum output, zero waste.
When not to use
Do not confuse with 'effectiveness', which measures goal achievement regardless of resources consumed.
Fun facts
- The theoretical maximum efficiency of standard silicon solar panels is about 29.4%, known as the Shockley-Queisser limit.
Related words
Explore more words
efficient, productivity, inefficiency, optimize, effective, optimization
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