Define the dependency
Identify critical services, access rights, personal data and the teams responsible for the relationship.

Prioritise suppliers by the access they hold, the data they handle and the operational impact of losing their services.
A payroll supplier’s certificate lists its head office. The business depends on a hosting service whose coverage is unclear.
Engagement scope
Identify critical services, access rights, personal data and the teams responsible for the relationship.
Confirm that a supplier report or certificate covers the service, locations and period you depend on. Record unresolved gaps, who owns the decision and any conditions on onboarding or renewal.
Set owners for remediation or risk acceptance, define review dates and consider what would trigger an earlier reassessment.
Which supplier would cause the most disruption if its service stopped?
Review supplier risk ↗