Player Usage Charts, which were originally named OZQoC charts (pronounced "OZ Coke"), explained over at Flames Nation and Hockey Prospectus were introduced in the 2011 off-season as a graphical representation of how players are being used. It combines two advanced statistics popularized and provided by Gabriel Desjardins: offensive zone starts (OZ), which has been adopted into mainstream media use, and shot-based Quality of Competition (QoC).

 

Normally it takes time for new developments to catch on, but within a few months it was adopted by statistical analysts in a dozen different sites, listed below in chronological order, and I was already working with NHL front offices to help them create their own.

 

Speaking of which, all the data you need to create your own OZQoC charts can be easily found courtesy of Gabriel Desjardins' Behind the Net, and also included in the NHL Super-Stats sheets posted here annually. Please let me know about your charts so I can add you to my list and keep you up to date on any new designs and developments.