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Agency capacity planner
What it does. Clients are separate funnels: 10 clients with 2,000 contacts a month each is 20,000
contacts a month and not one test — it is ten tests, because audiences do not merge. Enter one client
per line (name:contacts_per_month:cost_per_contact) and the planner returns, per client, how many
months until their arm reaches the floor, what one full two-arm test costs, who can be read first, and what
monthly volume a client would need to be readable inside your horizon.
The floor comes from the same formula as npx marketing-mindset sample: base 3%,
+20% relative lift, 80% power, alpha 0.05 → 13,914 contacts per arm, 27,828 in total.
Your roster
How to read the result
Each client has to deliver half the floor on one arm: a client at 2,000 contacts a month puts 1,000 in an arm, and 13,914 ÷ 1,000 is 14 months. At 6,000 a month it is 5 months; at 12,000, 3. A roster of small clients is a roster of long tests — parallel, but long.
The smallest volume readable inside the horizon is 27,828 ÷ horizon, so a 6-month promise needs 4,638 contacts a month and a 3-month promise needs 9,276. Clients below that line can still be sold definitions, instrumentation and a stop rule; they cannot be sold a verdict.
The planner does not invent a lift. If there is no lift to test, the honest answer is the smallest lift the
volume can read, which the CLI reports with
npx marketing-mindset mde --base 0.03 --per-arm 5000.
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Marketing engineer for agencies · the offer · channel verdict fit · two-sided verdict planner · test queue planner · test cost calculator · readable unit chooser · the same maths as an npm CLI · Telegram