In my company management is looking for screen-pumping-machine/production-line-factory for data centric (form entry) windows apps. And I am for the task to build the tool that should automate the estimations given the technical requirements.
I am trying to build a formula to estimate time to build web apps (ASPNET MVC, etc). Since the break-down activity list is kind of standard.
I wanted to know if someone out there had to build a tool like this for making his/her estimations before.
There is no silver bullet when it comes to work time estimations in the SE world.
You can do a gut-check based on your own capabilities and the time it took you to do similar things, but that's about it. You can track metrics on project/work time and attempt to extrapolate, but you'll need really good data to do any good projections.