Analytical testing is expected at each changeover unless justified otherwise via a robust, documented Quality Risk Management (QRM) process. The QRM process should consider, at a minimum, each of the following:
- the repeatability of the cleaning process (manual cleaning is generally less repeatable than automated cleaning);
- the hazard posed by the product;
- whether visual inspection can be relied upon to determine the cleanliness of the equipment at the residue limit justified by the HBEL.