Put five regions in a table, sort by cost per enquiry and a winner appears. The table may be accurate about its calculation while remaining incomplete about what the comparison means.
One region could be advertising a familiar repair service, another a newly launched installation package. Their enquiries have different requirements and commercial roles. A lower average cost does not automatically make the first region's plan the one everyone else should copy.
Establish a common outcome definition
Check what each team calls an enquiry. Does it include support requests, duplicate messages or calls that never reach an adviser? Are the same rules used for classifying a suitable request?
Where definitions differ, either reconcile them or state the difference prominently. An identical column heading should not conceal a different event underneath.
Use a comparable observation period. Recent requests may not have reached the same stage of review as older ones, especially when local teams update their records on different schedules.
Put the offer mix beside the result
A region handling more complex projects may need fewer enquiries to create the same amount of useful work. Another may be serving a broader range with a faster response process.
Include the relevant service group, campaign purpose and capacity conditions alongside the headline result. These details help explain why a simple ranking can be misleading.
Suppose a region stops advertising a service because its delivery calendar is full. Its lower enquiry total could reflect a sensible capacity decision. Without that context, the leaderboard may reward the wrong behaviour.
Make the comparison answer a decision
If the purpose is to improve a weak region, ask what can actually transfer: clearer copy, a better page, a useful qualification question or a more reliable handover. The cheapest region's budget arrangement may depend on conditions that do not exist elsewhere.
If the purpose is resource allocation, state the assumptions about capacity, service value and the opportunity for additional demand. A historical ranking is not a complete forecast of what another increment of activity will produce.
Give the footnotes a visible home
Put material qualifications beside the table rather than burying them in an appendix. A short explanation can prevent an attractive chart from becoming an unsupported instruction.
The regional comparison is still useful. Its value increases when the reader can see both the numbers and the circumstances that make a decision based on those numbers reasonable.
A thought worth keeping?
