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From an Information Technology perspective, what's the opposite of Proof of Concept (prototype)?

I'm looking for a better word which means "full-fledged version".

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    I wouldn't really call that an "opposite", though.
    – Joe Z.
    Mar 8, 2013 at 14:12
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    I agree - the opposite would be no product at all.
    – vonjd
    Mar 8, 2013 at 14:13
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    See also this question.
    – tchrist
    Mar 8, 2013 at 14:36
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    Opposite of "proof of concept"? "Disproof of concept"? While I've never heard this used, it is clearly needed for certain pieces of vaporware. Mar 8, 2013 at 15:24
  • Interesting that you used "full-fledged". It seems quite apt. i.word.com/idictionary/full-fledged It comes from "fledge" which literally means (for a bird) to become ready to fly on its own. i.word.com/idictionary/fledge Jul 11, 2015 at 8:10

3 Answers 3

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The opposite of a prototype — or a blueprint, or a sketch, or a mock-up, or a model — is a finished product or production version.

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  • Any other terms? I think he's looking for a synonym of "production version", like how "prototype" is the synonym for "alpha version".
    – Pacerier
    Jul 11, 2015 at 7:09
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I would call it a turnkey project. Wikipedia explains this as:

a type of project that is constructed so that it could be sold to any buyer as a completed product.

But with full-fledged version they would certainly know what you are referring to.

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  • Like the word "TurnKey", But I doubt if people would really understand it. Glad to learn a new word today. Thanks.
    – satya
    Aug 12, 2014 at 7:32
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    @vonjd, "turnkey" is the wrong term. Full fledged products can be both turnkey and non-turnkeys, they are not related in any way.
    – Pacerier
    Jul 11, 2015 at 7:08
  • "Turnkey" refers to how the product is delivered -- whether the supplier or the customer is responsible for installation and setup.
    – Hot Licks
    Jul 11, 2015 at 12:16
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It can be called as Beta Version or Feature Complete.

(Reference: see the Wikipedia article.)

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    Beta still has the connotation of a product that is known to be not quite ready. Technically, you're right; a beta version should have everything the customer has asked for and behave as they said it should; the beta test period is where you discover anything that differs between "what they asked for" and "what they need/want". It is common knowledge, however, that those two rarely meet on the first try.
    – KeithS
    Mar 8, 2013 at 20:57

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