Here a couple of links:
http://www.hbmaynard.com/training/basicmostcourse.asp
http://www.hbmaynard.com/training/univmostprogram.asp
Call them at 1-800-maynard to get more info.
http://www.hbmaynard.com/training/univmostprogram.asp
Look at the bottom section.
http://www.hbmaynard.com/training/basicmostcourse.asp
If you call them at 1-800-MAYNARD, you can request a white paper on what MOST is and how it is used.
This is a good first step. We do the same process but then we try and determine the fastest and slowest times in order to determine if a sub-category is needed. Sometimes the family is sufficient, some times we may have up to 5 sub-categories. These sub-categories we call attributes.