Tracey Richardson, president of Teaching Lean Inc. discussed A3 Thinking and Lean Problem Solving last May on the Business901 podcast and easily outdistance everyone else. If you listened to it only once, it is well worth listening to it a 2nd time. I was so impressed with the interview that I participated in her A3 problem-solving class in June at the Lean Enterprise Institute workshops. 
Tracey has over 22 years of experience in Toyota methodologies including: Lean Problem Solving, Quality Circles, Lean Manufacturing tools, Standardized Work, Job Instruction Training, Toyota Production System, Toyota Way Values, Culture Development, Visualization (Workplace Management Systems), Continuous Improvement (Kaizen), Meeting Facilitation/Teamwork, and Manufacturing Simulations.
Tracey’s Website: http://www.teachingleaninc.com
P.S. Tracey was a contributor to the Marketing with A3 eBook.
Transcription of the Podcast: Lean Problem Solving – eBook