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Cheap Test Plan for a New Product or Service Idea
Prompt
The idea: {{NEW_OFFER_IDEA}}
Who I think will buy it: {{TARGET_CUSTOMER}}
Maximum I'll spend on testing: {{TEST_BUDGET}}
Decision deadline: {{DECISION_DATE}}
Please:
1. List the 3 riskiest assumptions behind the idea, ranked by how badly the idea fails if each one is wrong.
2. For the top two, design the cheapest test that produces real buying signals, such as pre-orders, deposits, a waitlist with a price shown, or a pilot with existing customers. Avoid opinion surveys where possible.
3. For each test, give the steps, the cost, the time needed and a pass/fail threshold I commit to in advance.
4. Draft the exact wording of the offer or message used in the first test.
5. Say what I should do if the results are mixed.
Constraints: keep the total within budget. Prefer tests I can run with my existing customers and channels. Be blunt if the idea looks like a distraction from my core business.
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About this prompt
“Cheap Test Plan for a New Product or Service Idea” is a free prompt for ChatGPT in the Business category, 179 words long, added to The Prompt Index on October 28, 2026 by The Prompt Index. Copy it with the button above, paste it into ChatGPT or any other AI chat assistant, and send it.
It has 4 placeholders to fill in first:
{{NEW_OFFER_IDEA}}, {{TARGET_CUSTOMER}}, {{TEST_BUDGET}}, {{DECISION_DATE}}.
Use the “Customize this prompt” fields to personalise it before you copy.
Recommended models: ChatGPT, Claude, Gemini.
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