DMAIC:

1. Define the problem (Set the goal, ...)
2. Measure the problem (AS IS, ...)
3. Analyse (Root cause analysis, ...)
4. Implement (Find solutions test and implement)
5. Control (Monitor and sustain improvements, ...)

Popper’s method:

1. Problem definition ( "What to do next ?" Given the ... Root cause analysis, AS-IS / TO-BE, ...)
2. Tentative Solution (Tentative answer to the what to do next question, i.e. a guess for what to do to solve the problem)
3. Error-correction (Using not only data but also argument)
   1. New Problem