manuhack.com I am not sure if you guys have heard of this site (I am sure you have heard of others) but it does a great job computing your MPS. What I personally liked more is their slide show explaining the various methods of computing the MPS, check it out here: http://manuhack.com/static/research/cfamps/cfamps.pdf Personally, I like the Bayesian approach, the other methods are simplifications. Check it out if you have a few minutes it’s a quick and worthy read through.