Which method is commonly used for root cause investigation?

The 5 Whys technique is a widely recognized method for conducting root cause investigations because it encourages a deeper understanding of the connection between a problem and its underlying causes. By repeatedly asking the question "why"—typically five times—investigators can trace the problem back to its source. This iterative questioning helps peel away the layers of symptoms and assumptions that may obscure the fundamental issue, allowing for the identification of true root causes.

This technique is advantageous because it is simple to understand and can be applied quickly in various settings. It does not require extensive data collection or elaborate tools, making it accessible to many teams. This straightforward approach fosters critical thinking and cultivates a culture of problem-solving within organizations.

The other methods listed, such as Flowchart Analysis, Fishbone Diagram, and Brainstorming Sessions, serve important roles in problem-solving and process improvement. Flowchart Analysis helps visualize processes and identify where issues may arise, while Fishbone Diagrams (also known as Ishikawa diagrams) categorize potential causes of problems into various categories. Brainstorming Sessions generate ideas and solutions collaboratively. However, these methods do not specifically focus on the iterative questioning process that is the hallmark of the 5 Whys technique in determining root causes directly.