PDCA
This Deming cycle sample shows plan-do-check-act diagram.
It was designed on the base of Wikimedia Commons file: Pdca.png. [commons.wikimedia.org/wiki/File:Pdca.png]
This file is licensed under the Creative Commons Attribution-Share Alike 3.0 Unported license. [creativecommons.org/licenses/by-sa/3.0/deed.en]
"PDCA (and other forms of scientific problem solving) is also known as a system for developing critical thinking. At Toyota this is also known as "Building people before building cars." Toyota and other Lean companies propose that an engaged, problem-solving workforce using PDCA is better able to innovate and stay ahead of the competition through rigorous problem solving and the subsequent innovations. This also creates a culture of problem solvers using PDCA and creating a culture of critical thinkers." [PDCA. Wikipedia]
The plan-do-check-act diagram example "PDCA" was designed using ConceptDraw PRO software extended with Plan-Do-Check-Act (PDCA) solution from Management area of ConceptDraw Solution Park.