Thank you ladies for the great information.

This is an interesting discussion. The drafting option makes more sense to me because I would rarely have a pattern on a piece of paper to be resized on a copy machine. Maybe I'm missing something here. It would seem like if you had to draft the pattern to get it on a piece of paper so you could then take it to a copy machine why not just use the second method to begin with.
Another question - once you get it on the paper and resized do you then measure all the pieces while on the whole sheet of paper or cut them out to make templates or measure them that way.
Sorry, I just can't seem to get my brain around the whole process. I understand the math part fine.