We're sometimes asked, "What is the difference between Green Belt and Black Belt projects?".
The answer boils down to the type of tools necessary to solve the problem at hand.
Most real-world problems can be solved with fairly simple tools. If you can find the process's input variables, prioritize them, study the important ones, take appropriate action, and constructively use Pareto charts, Process Behavior Charts, and can create a Control Plan, you can do a successful and meaningful Green Belt project.
If the problem requires advanced tools like the Student's T Test, the Chi Square Test, or Full or Fractional Factorial Experiments, it's probably a Black Belt project.
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