Brooks's law: why adding people makes a late project later
Integration: why splitting a project between more people is work too
Give each new developer a piece of the software, and every piece works on its own. Then someone has to make the pieces fit together, and that job grows with every cut.
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To give the new people work, you cut the app again: sign-up into three pieces, results into four. Seven people, seven pieces.
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But one of the new cuts runs right through the part Miva built. The bit past the cut now belongs to a new person, who builds it again to fit the new piece, and Miva's work there is lost.
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