Let's say you're running a department or you have a task to do. Sit down and define perfection with respect to your area of responsibility, with numbers and specifications, whether it's a financial analysis responsibility, a marketing responsibility, or a program management responsibility. Work with the folks around you. Then, with the same specifics, define where you are today. There are tools to help you do that.
Process mapping is one.
Define the end state, define where you are, and then establish your priorities for moving from one to the other. That's basically what Six Sigma is and anybody can use it. But you can't be proficient at it until you've learned all the tools. You might not be able to take on highly complicated things, and your process map may be awkward, but the principles are the same and anybody can get started on it right away. Well, obviously the impact gets to be greater as you move higher in an organization and that's the next question.