1. Are customer complaint handled by management?

2. Is factory operating a formal handling of complaint procedure?

3. Are the complaints analyzed and investigated the root causes?

4. Are corrective and preventive actions taken to eliminate the non-conformity.

5. Is the corrective and preventive plan communicated with the customer?

6. Is there any adequate traceable handling of complaint records?

7. Do records show that the corrective and preventive actions are properly conducted and monitored to be acceptable?