Notion of Repeatable processes

From the recent discussion on PragmaticProgrammer Mailing List:

(From Mail from Andrew Hunt)

Here's a side question for ya'll on the notion of repeatable process: I want a formula of how to make a hit movie. Perfectly repeatable, with no consideration of the talent involved. Just turn the crank and rely on the process to work.

Now replace the 'hit movie' with Software Product/Project. I never seen the concept explained with such a simple and thought provocating metaphor.