Great article. I loved how you embrace different levels of detail. I some times do just high level visualizations of distribution, sometimes the situation begs for you to specify more details that speak to visual design.
Love those eight iterations.
Thanks for sharing this - share it with every designer you know. I can't believe how little I see sketching utilized by other designer, as it's probably my most efficient tool!
Kinda clean website, but that top image is way too big, took around 10 seconds for me to load.