Differences in sales results are usually attributed to individual skill. A substantial share is determined by how territories were drawn before anyone made a call.
Potential is unevenly distributed by design
Territories built on geography inherit whatever economic density that geography contains. A metropolitan area and a rural region of equal square mileage hold very different numbers of buyers.
When quotas are then set uniformly, the representative in the thinner territory must win a far higher share of available opportunity to reach the same number.
The visible outcome is a performance ranking that partly measures territory assignment. Promotion and termination decisions made from that ranking inherit the same distortion.
Travel time is capacity that never sells
In field sales, hours spent driving are hours unavailable for meetings. A dispersed territory reduces achievable call volume regardless of effort.
Compact territories therefore support more customer contact per week, which is why coverage planning treats drive time as a direct input rather than an afterthought.
Remote and inside selling reduces but does not remove this. Time zone spread performs a similar function, compressing the window in which calls can be made.
Account load determines depth of coverage
A representative with too many accounts contacts each rarely, and the ones that receive attention are those that ask for it rather than those with the most potential.
Too few accounts produces the opposite problem: over-servicing of a small base, and pressure to generate activity where none is warranted.
Load is usually set by estimating how much contact an account of a given size requires annually, then dividing available selling hours by that figure.
Redrawing territories carries a real cost
Relationships and account knowledge do not transfer cleanly. A reassigned account typically sees a period of reduced engagement while the new representative rebuilds context.
Compensation disruption is the sharper issue. A representative who loses a large account mid-year loses expected earnings, and turnover following redraws is a common consequence.
Transition rules, such as continuing to credit prior-year accounts for a defined period, exist to manage this. Their absence is why many organizations delay necessary redraws.
Data quality limits the whole exercise
Balancing territories requires an estimate of potential by account and area, drawn from firmographic data, purchase history and market sizing.
When that data is stale or incomplete, the design optimizes against a picture of the market that no longer holds, and the imbalance persists in a new shape.
Reviewing assignments on a regular cycle, against refreshed data, keeps the drift bounded. Territories left untouched for years reliably diverge from where the business actually is.