QUESTION#1: Is it correct that in Six Sigma, only belters are qualified to solve problems?
ANSWER: BIG NO. That line of thinking shows IGNORANCE of those who do not completely understand Six Sigma. Lean Six Sigma belters are not the only ones qualified to solve problems. Belters are facilitators of the process improvement tools and methodology- process owners are the realproblem solvers.
QUESTION#2: WHICH IS BETTER? Lean/ Kaizen OR Six Sigma?
ANSWER: No methodology is "superior" than the other. It depends on the need and how the company successfully deploys the initiative. It is FUNNY that until now, there are still debates happening between "Kaizen die hard practitioners" vs Die hard Six Sigma practitioners.
QUESTION#3: Six Sigma is inferior than Kaizen because look at Motorola, Kodak and several Six Sigma companies, they are not anymore on top of their industry?
ANSWER: Six Sigma (even Kaizen and lean) doesn't tell a company if its products and services are marketable. Even if Kodak produces 99.9997% yield of films, at this digital time, no one will buy films. Six Sigma (even Kaizen and lean) doesn't address product / service innovation. It focuses on processes.