Five membership numbers before more ad spend

One-line takeaway

Before buying more demand, prove that the current funnel is measured from eligible opportunity through activation and renewal.

The source-backed signal

This analysis uses arithmetic definitions and operator-supplied records; it does not use an industry performance benchmark. The U.S. Department of Energy maintenance guidance is included only as public context for recurring equipment care—not as evidence for a conversion or retention target.

Interpretation

Independent interpretation: ad spend can amplify a good system or make an unmeasured leak more expensive. The reporting job is to show where the next unit of attention belongs.

The five numbers

1. Eligible opportunity coverage

eligible records with a known outcome ÷ all eligible records. A weak coverage rate means the team cannot yet interpret downstream conversion responsibly.

2. Offer rate

membership offers recorded ÷ eligible opportunities with a known outcome. Define “offered” with one verifiable state; do not mix training completion or script exposure into it.

3. Qualified conversion rate

new members ÷ qualified membership conversations. Keep this separate from “new members ÷ all service jobs.” Both can be useful, but they answer different questions.

4. Activation rate

new members completing the defined first-value action ÷ new members eligible to activate. Choose the action before looking at results: welcome completion, benefit use, first maintenance booking, or another observable event.

5. Cohort renewal rate

members renewed in cohort ÷ members eligible to renew in cohort. Exclude members whose renewal date has not arrived. Keep payment-failure recovery visible as a separate operational state.

Why cohorts matter

A portfolio-wide retention number mixes members with different start dates and eligibility. A cohort ties the denominator to the same renewal opportunity. That makes a trend interpretable without pretending that the result is causal.

Missing is not zero. Eligible is not contacted. Contacted is not offered. Offered is not enrolled.

A one-meeting reporting playbook

1. Write a plain-language definition beside every metric.
2. Show the numerator and denominator, not only the percentage.
3. Add an “unknown” state to every handoff.
4. Use one fixed cohort window.
5. Choose one metric that a team behavior can change this week.

Next metric to watch: eligible opportunity coverage. If it is incomplete, fix state capture before increasing spend or judging conversion.

Sources and provenance

• U.S. Department of Energy, Maintaining Your Air Conditioner — service-context reference only.
• Formulas are explicit arithmetic definitions, not market benchmarks.
• No private FSM, customer, or employer data used.