Prioritize the Potential Causes

By now, you should have 25 to 50 potential causes (Xs) identified that might affect Y, and it’s time to prioritize the list for investigation. Basically, you want to identify the vital few xs that create most of the variation in Y. The team needs to narrow the list of potential xs down to a workable size, say 10 or so. The list should be focused on potential causes, not just the easiest xs to