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Efficiency vs Usefulness - What's the difference?

efficiency | usefulness |

As nouns the difference between efficiency and usefulness

is that efficiency is the extent to which time is well used for the intended task while usefulness is the quality of being useful, to which extent something is useful.

efficiency

English

Noun

  • The extent to which time is well used for the intended task.
    • The efficiency of the planning department is deplorable.
  • * {{quote-news
    • , year=2012 , date=September 7 , author=Phil McNulty , title=Moldova 0-5 England , work=BBC Sport citation , page= , passage=The display and result must be placed in the context that was it was against a side that looked every bit their Fifa world ranking of 141 - but England completed the job with efficiency to record their biggest away win in 19 years.}}
  • (dated) The quality of producing an effect or effects.
  • * Hooker
    • The manner of this divine efficiency being far above us.
  • The extent to which a resource, such as electricity, is used for the intended purpose; the ratio of useful work to energy expended.
    • The efficiency of this loudspeaker is 40%.
  • (United States) A one-room apartment.
    • I have an efficiency available June through July.
    fully-furnished efficiencies

    Antonyms

    * inefficiency * wastefulness

    Derived terms

    {{der3, energy efficiency , material efficiency , fuel efficiency , efficiency ratio , business efficiency , quantum efficiency , electrical efficiency , thermal efficiency , algorithmic efficiency , Pareto efficiency , allocative efficiency}}

    Related terms

    * effect * effective * effectiveness * effectivity * effector * effectual * effectuate * efficacious * efficacity * efficacy * efficient * efficiently

    Synonyms

    * effectiveness * (qualifier) bedsit

    usefulness

    English

    Noun

    (-)
  • the quality of being useful, to which extent something is useful
    • The usefulness of his latest reorganisation has been disputed.

    See also

    * beauty