The Jonah Thinking Processes in Eliyahu M. Goldratt's Theory of Constraints, are the method to enable the focused improvement of any system.
The purpose of the Jonah Thinking Processes is to identify ways to solve systemic problems; in essence, to break the the "constraint" of one's thinking patterns. It seeks to identify the root cause of many symptoms, or effects in a system, develop logical solutions to systemic problems, and create implementation plans. These three are referred to as the three questions of change, "What to change?", "What to change to?", and "How to cause the change?"