http://sloanreview.mit.edu/the-magazine/2009-summer/50408/toyotas-secret-the-a3-report/
Problem Solving
Toyota’s Secret: The A3 Report
The A3 report, with its logical series of boxes and graphics, looks simple in layout but the underlying thought process is rigorous when practiced correctly. The payoff for companies that diligently apply "A3 thinking" is the creation of a method for solving problems, planning, collaborating, and mentoring everyone in scientific thinking. (Published by Sloan Management Review. Requires subscription or purchase)