I have a novice question for modeling the segment portion of the IS. For those of you whocourse, the example of Apply breaks down the segment section into 3 part - Products, Units, and ASP(Average Selling Price). By forecasting the growth in both Units and ASP, the new projection in Products becomes available, which goes back to filling everything else. My problem is that I don't understand how to set up the segments for other companies. For example, I' , and its segments are by region (not product), so how would I set that up? I have thought of doing it by the growth rate of operating income of each region, but I'm not sure if that makes sense. I don't really care about being correct, just want to understand how it all works. How many parts does the segment need to be to get something like Apple : a/b=c? I am not looking for the growth rate, just how to set it up. Thank you for the help.