http://www.tbs-sct.gc.ca/ppg-cpr/framework-cadre-eng.aspx?Rt=1037
It looks something like this:
I'm no expert, but it doesn't look like it's accessible for the visually impaired.
The following page explains in more detail how it works/how it is used:
http://www.tbs-sct.gc.ca/reports-rapports/cp-rc/2006-2007/cp-rc02-eng.asp#Introduction
