Principle
Before a single sales call is made, a substantial portion of the variance in rep performance has already been determined by how accounts were assigned. Organisations that do not measure territory quality independently of rep performance are systematically unable to distinguish between a strong rep and a strong territory, and they make talent decisions accordingly.
Behaviour
Territories are typically assigned through some combination of geography, industry vertical, account size band, and historical accident, with adjustments made over time as reps join, leave, and are promoted. Very few organisations run any formal analysis of whether the resulting territories carry comparable revenue potential, and fewer still repeat that analysis as the market and the customer base evolve underneath the original assignment logic.
The consequence is that some reps operate in territories dense with well-qualified, high-propensity accounts and some do not, and the difference is frequently larger than the difference in individual capability across the same team. A capable rep in a depleted territory posts mediocre numbers and receives coaching aimed at their technique. A mediocre rep in a rich territory posts strong numbers and gets promoted into management, where their actual capability finally becomes visible and expensive.
Where attainment stays constant across a change of rep, the territory is doing the work. Where it shifts materially, the rep is.
Evidence
Construct an independent measure of territory potential that does not reference the incumbent rep's performance: total addressable accounts in the territory, average account size, historical win rate for that segment across all reps, and the density of accounts with a known trigger event or existing relationship. Then plot rep attainment against territory potential.
In a well-managed organisation the correlation should be weak, because territories have been balanced and performance genuinely reflects capability. Where the correlation is strong, attainment is substantially measuring territory rather than rep, and every downstream talent decision built on attainment is built on a confounded variable.
A revealing supplementary analysis: identify any territory that has changed hands between reps in the last three years and compare attainment before and after the handover. Where attainment stays roughly constant across a change of rep, the territory is doing the work. Where it shifts materially, the rep is. This is one of the cleanest natural experiments available inside a commercial organisation, it requires no new data collection, and it is almost never run.
Psychology
Sales leaders resist formal territory analysis for understandable reasons. Any rigorous measurement will reveal that some reps have been unfairly advantaged and some unfairly penalised, which raises immediate and uncomfortable questions about past promotion, compensation, and termination decisions that were made on the assumption that attainment measured capability. Reopening those questions serves nobody currently in the organisation.
Reps in strong territories have no incentive to raise the issue, and reps in weak territories who complain about territory quality are frequently, and sometimes correctly, perceived as making excuses, which makes the complaint self-defeating regardless of its merit. The organisation therefore has no internal advocate for the analysis, and it does not get done, which allows the confound to persist indefinitely and compound through every subsequent talent decision built on top of it.
Commercial Risk
Any assessment of commercial team quality that relies on attainment distribution is unreliable in the presence of unmeasured territory variance. An organisation that appears to have three excellent reps and eleven mediocre ones may in fact have three excellent territories, and a post-acquisition plan built on retaining the former and coaching or replacing the latter will misallocate both retention spend and management attention.
This risk compounds directly with Hero Dependency. Where a supposed hero rep is in fact occupying the richest territory in the organisation, the perceived key-person risk is substantially overstated, while the genuine, addressable problem, a badly balanced territory model suppressing the performance of most of the team, remains entirely undiagnosed.
Investment Committee Note