Seven Whys
❓ Ask “why” seven times to get to the root of an issue
Sometimes five “whys” are enough … Problem: The vehicle will not start.
Why? – The battery is dead
Why? – The alternator is not functioning
Why? – The alternator belt has broken
Why? – The alternator belt was well beyond its useful service life and not replaced
Why? – The vehicle was not maintained according to the recommended service schedule. (Fifth why, a root cause)
This method was developed by Sakichi Toyoda, founder of Japan‘s largest automaker