5 WHYS

“5 WHYS” is the Taichii Ohno’s practice of asking why repeatedly whenever a  problem is encountered in order to discover the root cause. Thereby, effective  solutions can be developed and applied.

• WHAT: The Five Whys offer one way of identifying the root cause of a problem. As the name implies, it’s essentially a matter of asking Why? – five times in succession.
• WHEN: The technique is used whenever you want to delve deeper into the causes of a problem.
• HOW: First, state the problem. Then ask, “Why?” (or “Why is this happening?”). Ask the same question four more times.