A vendor that started last week will have more unresolved inquiries than one that has supplied the firm for months. Comparing their current signed totals can punish the newer source for work that is still in progress. A cohort is a group defined by when inquiries entered the process. Compare groups at the same age before interpreting the difference as a source-quality problem.
Use Inquiry Entry As The Starting Line
Choose a consistent entry event, such as the first valid delivery into intake. Do not start one vendor's clock at the ad click and another's at the completed consultation. Keep the original entry date when a record is reassigned or reopened. If a genuinely new matter arrives from the same person, give that matter its own entry event.
Group inquiries by a useful period and source. Weekly groups may expose operational changes; monthly groups may be easier to interpret for a small practice. Keep the underlying records available so a single unusual matter does not disappear inside an average. The group size is an analytical choice, not an industry rule.
Build An Age-Based View
For each cohort, record its size and status after the same number of elapsed days. Useful checkpoints might be contact established, review completed, engagement completed, and matter opened. Choose checkpoints that match the firm's actual process. Preserve both the number reaching a stage and the number still waiting, rather than publishing a conversion percentage alone.
Illustrative comparison: Source A produces 100 inquiries, with 12 opened matters by day 30. Source B produces 100 inquiries, with eight opened matters by day 10 and 20 still awaiting a decision. Comparing 12 with eight today says little about day-30 performance. The honest comparison either waits or labels B's result as immature.
Separate Slow Work From Pending Work
An unresolved record is not automatically future success. Inspect the age and next action for the open group. Some matters await a scheduled consultation; others have no owner or an unanswered document request. Treating every open item as promising can conceal a broken process just as easily as treating every open item as lost can conceal a viable source.
Segment by the parts of the practice that actually require different work. An FCRA inquiry awaiting specific records and an injury inquiry awaiting an initial firm decision need not share one expected timeline. Let reviewing attorneys define relevant workflow distinctions. Do not infer merit or urgency from the marketing category alone.
Set A Review Window And An Exposure Limit
Before a source trial begins, agree on the first meaningful review date and the spending exposure the firm can tolerate while outcomes develop. These are different controls. A cash or staffing limit may require a pause before the final conversion result is mature. Explain that pause as an exposure decision instead of declaring the source ineffective.
Use an early operational checkpoint to detect delivery failures, inaccurate targeting, or missing ownership. Reserve the later checkpoint for outcomes that require more time. If the firm changes its acceptance criteria during the trial, mark the affected cohort and avoid presenting the result as a clean source comparison.
Keep Historical Snapshots When Results Change
A record can move from open to accepted, close after nonresponse, or reopen after new contact. Store the reporting date with each cohort snapshot and retain the reason for material revisions. Otherwise, last month's result can change silently and leave budget decisions impossible to reconstruct.
At the renewal meeting, show equal-age results, current open work, and the range of plausible outcomes without treating that range as a forecast. If a decision remains sensitive to a handful of unresolved matters, a smaller continuation may be more informative than either a full expansion or a permanent stop. The owner should see what additional evidence the next period is expected to provide.
Common Questions
How Long Should A Legal Acquisition Cohort Mature?
Use the firm’s observed transition times and the decision being measured. Contactability can be assessed sooner than opened matters or collections. State the observation window explicitly, and do not borrow a fixed maturation period from another practice or supplier.