Software cost estimation is tricky business even when all the variables are known --
knowledge which we certainly don't have.
We calculate the estimated cost of the project using the Basic COCOMO model.
For those familiar with the details, we are using coeffcients a=2.4 and b=1.05.
Please note that COCOMO was created to model large institutional projects,
which often don't compare well with distributed open-source projects.
COCOMO is meant to include the design, specification drafting, reviewing and
management overhead that goes along with producing quality software.
This model seems to be most accurate with mature, large projects.
Young projects with little activity are typically overvalued.