Ask Five Whys
A simple method for getting to the root of any problem.
What is the Five Whys?
The Five Whys is a simple but powerful method for getting to the root of any problem. Instead of treating symptoms, you ask "Why?" repeatedly until you uncover what's actually causing the issue.
How to use this tool
- Describe the problem you're facing.
- Ask what caused it, and write down the answer.
- Treat that answer as the new problem and ask again.
- Stop when you hit something that feels like the real root — anywhere from three to five whys is normal.
A short history
The method was developed by Sakichi Toyoda and became a cornerstone of the Toyota Production System. Most problems have a deeper cause hiding beneath the surface — by asking why repeatedly, you move past the obvious and find the real source.
You don't always need exactly five. Sometimes three gets you there. Sometimes it takes seven. The number isn't the point. Staying curious until you hit the root cause is.