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Reviewed 26 October 2026. Original publication date retained: 2026-01-28.
A change to a treatment input needs competent evaluation within the operator's responsibilities and applicable requirements. A quality-management audit can follow that process without inferring the cause of a named outage or prescribing a treatment method.
Questions to follow in an audit
- How are input specifications and supplier changes controlled?
- Who evaluates suitability before the changed input is used?
- How are unexpected results escalated and investigated?
Connect the records with practice
Trace one input change through specification, competent review, acceptance records and follow-up of an unexpected result.
These are illustrative audit trails, not findings about a named organisation, technical instructions or a guarantee of a particular result. The appropriate evidence depends on the activities, risks and agreed scope. The organisation remains responsible for its operations and legal obligations.
AAA provides independent certification audits. Confirm the applicable standard edition, scope and customer requirements before agreeing a programme. Request an indicative price or discuss your proposed audit.
Further reading: ISO quality management.