[Zope] Cost estimation for developing a Framework or CMS

[Martin Gebert]

Good evening!

This has nothing to do with Zope directly, but I'm in the hope one of 
you might know a source for an estimation of the costs (some kind of 
study or report; manhours/days/months as unit would be fine) for 
implementing a Web Application Framework (like Zope, or something of a 
smaller scale) or a CMS. Are there some figures of this kind available 
for Zope, too?
I need this for stuffing my thesis a bit with numbers...

Thanks!

Martin