Some ways in which Lean Six Sigma has changed my thinking:
Helping me systematically think about what "improvement" means in different contexts. When we hear the words, "this system should improve" or "this product should become better", we may think of one or two ideas based on our understanding of the process or product. Most of the time, we don't have a structure in such thought. Six Sigma allows us to think through how we would define such a problem as a business problem, how to take it into the statistical domain or analytical domain, and how to find solutions. This is a very basic and fundamental change, which has impacted the way I do every project I take up.
Lean Six Sigma helped me personally improve my own speed and efficiency of doing things. My colleagues and I developed systems like "personal kanbans" and used 5S in our workplaces. This allowed us to improve the way we work, and spend every minute of our time in a useful, productive way, and get the most out of our jobs and opportunities.
A stepping stone to leadership. Lean Six Sigma allows people with leadership potential to hone the way they think problems through and implement large scale change. Without the tools of six sigma, I would not have transitioned from an engineering professional to someone who has skills in leading teams, initiatives and programs in Fortune 50 organizations.