The Throwaway Probe
Time cap
One afternoon. Hard stop.
Use when
You have an intuition about a behavior, a market, or a workflow — and you are about to spend a week (or a quarter) building the 'real' thing to test it.
- 01
Name the smallest observable behavior
Not 'do users want this feature.' Something you could watch happen or not happen — a click, a signup, a reply, a share, a request for pricing.
- 02
Build the ugliest surface that could produce that behavior
A landing page. A Loom. A hand-typed email. A Notion doc with a form. If it takes more than an afternoon, you are already building the thing, not probing it.
- 03
Write the kill number before you launch
'If fewer than X of Y people do the thing in Z days, I will not build this.' Written down, dated, shared with at least one person.
- 04
Put the probe in front of the right people, not any people
Distribution matters more than polish. Ten right people beat a thousand random ones. If you have to synthesize traffic, the probe is not testing what you think.
- 05
Read the trace, not the total
Watch what happened between arrival and action. The number of conversions is a headline; the sequence of events is the actual data.
- 06
Kill, iterate, or promote — same day
The probe expires at end of day. Sitting on it becomes sunk cost. Decide, write the decision and the reason, and move.
Output
A one-page note: what you tested, what you saw, what you decided, and why. Filed by date, findable in six months.
Fails when
The probe grows. If you catch yourself designing the 'real' version while running the probe, stop — you have already made the decision the probe was supposed to inform.