The set of accounts one salesperson is responsible for, defined by geography, segment, named accounts or a mix. The unit of coverage, quota and planning.
Every account in exactly one territory. Every territory owned by one person, or explicitly vacant. The sum of territory potential equals the company's potential. A territory plan that fails any of these cannot be compared with one that does not.
Accounts per territory, potential per territory, current revenue per territory, and the spread of each across the team. Fairness is a tight spread of potential.
A territory change is a dated event. Accounts moved mid-year belong to the old owner before the date and the new one after. Without the date, the roll-up counts the account twice or not at all.
The set of accounts one salesperson is responsible for. Whatever the rule, geography, segment, named accounts or a mix, every account must belong to exactly one territory, and territory totals must sum to the company.
A hybrid model has twelve geographic territories and two named-account reps. A precedence rule puts each named account under its named rep only, so revenue is not counted in the geography as well.
An account in two territories. Both reps are credited, the territories sum to more than the ledger, and nobody owns the customer.