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  1. Newbie
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    #1

    Efficacy vs efficiency

    Hello,

    The title speaks for itself and I don't seem to get the difference . Some examples would be appreciated.

    Thank you.

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    #2

    Re: Efficacy vs efficiency

    "Efficacy" is not a commonly-used word. It means that something is able to produce the intended effect, to do what it is you want, to get the job done.

    "Efficiency" is being able to do something with the least amount of effort or waste.

    An Abrams tank, my Kia crossover SUV and a motorbike would all be efficacious in getting me from my home to work. But there would be varying degrees of efficiency involved in the three, in terms of cost and fuel use.

  3. Skrej's Avatar
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    #3

    Re: Efficacy vs efficiency

    Quote Originally Posted by SoothingDave View Post
    But there would be varying degrees of efficiency involved in the three, in terms of cost and fuel use.
    As well as parking.

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    #4

    Re: Efficacy vs efficiency

    With the tank, I park wherever (and on top of whatever) I want.

  5. MikeNewYork's Avatar
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    #5

    Re: Efficacy vs efficiency

    "Efficacy" is very commonly used in medicine.

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    #6

    Re: Efficacy vs efficiency

    Efficiency is often quantified in terms of percentage (input/output) whereas efficacy which is about achieving the desired effect is not.
    I am not a teacher.

  7. MikeNewYork's Avatar
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    #7

    Re: Efficacy vs efficiency

    "Efficacy" is often expressed in percentages. Antibiotic X has a 70% efficacy against Lyme disease.

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    #8

    Re: Efficacy vs efficiency

    Quote Originally Posted by MikeNewYork View Post
    "Efficacy" is often expressed in percentages. Antibiotic X has a 70% efficacy against Lyme disease.
    Does that mean the drug does not cure the disease completely?
    I am not a teacher.

  9. MikeNewYork's Avatar
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    #9

    Re: Efficacy vs efficiency

    No. It means that the drug does not cure 100% of the patients.

  10. Moderator
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    #10

    Re: Efficacy vs efficiency

    Quote Originally Posted by BallsOfSteel View Post
    Some examples would be appreciated.
    Click here for more examples than you could possibly need, then change the search word to efficiency.

    Bookmark the site for future reference.

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