How concentration builds without a decision
No one signs a contract titled critical dependency. Concentration accretes: a module added because integration was easy, a second process migrated during a cost review, a renewal extended for a discount. Each step is locally rational, and the sum is a vendor no one chose to depend on. The score exists to see the sum, because the organisation only ever saw the steps.
The renewal is the exam
A vendor relationship reveals its true balance of power at renewal. If the vendor knows you cannot leave, the negotiation is a formality with meetings attached. The paradox of exit planning is that its value peaks when it is never used: a tested exit path changes renewal pricing even if you stay for a decade.
Who should score it
- Procurement leaders reviewing the vendor portfolio for exposure rather than spend.
- CIOs and COOs whose critical processes have gradually consolidated onto fewer platforms.
- CFOs testing what an unplanned vendor exit would actually cost the organisation.
Reading the result
Eight answers at 0, 5 or 10 points, normalised to 100, where higher means deeper dependency. Score your top vendors annually and watch the movement: a rising score across renewals is the clearest early warning this tool produces, and it is invisible in any single year's snapshot.