Do teams get more productive by adding more developers? [duplicate]

Posted by jgauffin on Programmers See other posts from Programmers or by jgauffin
Published on 2013-06-27T09:37:01Z Indexed on 2013/06/27 16:28 UTC
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team

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efficiency

This question already has an answer here:

Why does adding more resource to a late project make it later? 12 answers

Suppose you've got a project that is running late. Is there any proof or argument that teams become much more productive by adding more people? I am looking for answers that can be supported by facts and references if possible.

What I'm thinking about is that existing devs have to teach the new ones (thus losing overall development time), and then the new developers have to study the code (and tasks) before they can become fully productive.

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