At what level should we map? I’ve done VSMs where an entire factory (a big one, making lawn tractors) was merely a box on the map. Our focus was on logistics and distribution- we included inventory, capacity, and setup time in the factory box, but that was about it. On the other end of the spectrum, I’ve done VSMs for an Order Entry process. We got into much greater detail and discussed when/how credit approvals were done, etc. The level you go to really depends on your goals and scope of the VSM. If I were taking a first crack at VSM, I’d start door-to-door in a process, using major activities as my process boxes. If you find that one or more of these process boxes are real issues or need a better depth of understanding, you can complete a follow-up VSM on that process which includes more detail.