Finding the root cause: Who does what

Step	Food handler	Person in charge	Food safety supervisor	Accountable manager	Verifier	Programme owner	Specialist contractor
1. Contain first, investigate second
2. Say exactly what went wrong
3. Read the evidence
4. Keep asking why
5. Check what the cause does to the scope
6. Fix it at the right level
7. Check it worked, and change the plan

One person often holds several roles in a small business. Verifying is best done by someone who didn't do the work.