The audit is a structured conversation, not a questionnaire to fill in. The consultant asks how incidents, requests and changes really flow today, which service levels you commit to and how you measure them, how your teams use the tool, and where the friction is.
Each answer is mapped to the ITIL v4 practices behind it: incident, service request, change, problem and knowledge management, service level management, and the configuration and asset data they depend on. That is what makes the score comparable from one audit to the next, and the priorities concrete.
If you want to prepare, our guide to service desk KPIs lists the indicators we usually look at.
Think of it as a short ITIL maturity assessment and a service desk audit in one call; the two-week diagnosis that can follow goes deeper, on your own ticket data.