Key Account Owners: What Guidelines Do You Follow?

I’m part of a small firm that serves around 100 clients each year, with about 30 of them being regulars that rely on us for their staffing needs.

We’re currently working on clarifying what qualifies a client as a Key Account. Recently, a subsidiary of a previous client reached out for staffing assistance, but they have begun collaborating with a different recruiter amid some office conflicts. Our last engagement with this client was a single placement three years ago, which management feels does not warrant “Key Account” status.

Do you have any internal guidelines for managing this? We’re looking to establish a policy to prevent any potential disputes in the future. Your insights would be greatly appreciated!