In their 'How to start a Two-Bit Operation' Blog the authors set out their criteria and weights for judging a set of possible business ventures.
http://www.twobitoperation.com/blog/2006/01/25/setting-the-decision-criteria-for-picking-the-venture/      [click on 'venture decision criteria']
Ratings in this Annalisa  snapshot are purely hypothetical but show how weighting influences the outcome.  alt file here