"You can see it from the side." Internal audit also takes place, but usually competent specialists are invited to ensure the independence of the assessment from the outside. Internal specialists who are well versed in the production process itself may not know how to check and identify weaknesses, and the assessment will still be biased.
"We're not hiding anything." When conducting an audit, all staff with whom investigators will be in contact should be aware of the purpose of the audit. Without the support and cooperation of the staff, the success of the study can hardly be expected.