[josegonzalez]

You either never read the book or are interpreting it wrong.

The premise is that as you add more people to an EXISTING project, the amount of time it will take to complete will increase. However, if all of those people are involved from the beginning, then you are not subject to the same phenomenon - within reason of course.

So while it might not be "6" developers working on it for a year, it could potentially be 9 very devoted developers cranking this out with good results towards the end of the year.

[Danieru]

Brookes also talks about another issue, that in a team of 6 there are (6 choose 2) edges in the communication graph. I think this is what kyriakos was referring to.