I'm looking for the system behind the various 'generators' used by the Dragon in some of the old articles for creating 'random' giants, dragons, treasure, etc. There was an inbuilt mechanism that folded the results back in rather than go to far. Ex: If a treasure was worth 4000 GP, and the first item was worth 3500, the rest would be lower to match. I'm trying to do a CR balancing chart for encounters, etc.
If anyone knows, I'll be grateful.