Scrum Picture
I recently passed the PSM I assessment and want to share a Scrum Overview picture I prepared for visualizing the main process. You can see it on my blog at http://blog.mdxs.net/2014/12/professional-scrum-master-i-psm-i.html
It is based on work by other people (see links and attribution in blog text), most notably Mark Hoogveld's overview from which the "demand", "supply" and "service" labels have been retained (see the # of persons for Product Owner, Development Team, and Scrum Master). These labels don't appear in the official Scrum Guide, July 2013 edition as far as I know; but they fit with my mental model.
Beautiful!!