Calculate product opportunity size
Estimate the value of an opportunity honestly, including the parts you cannot know.
What this prompt helps you do
A sizing model with stated assumptions, ranges, sensitivities, and confidence levels.
When to use it
A prioritisation decision needs a magnitude estimate rather than a false precise number.
What to prepare
The goal, relevant source material, constraints, examples, and the decision or action this should support.
How to get a strong result
Show the range and the assumptions driving it; a single confident number hides the real uncertainty.
How to use this prompt
Replace each placeholder with accurate context. Paste the complete prompt into ChatGPT, review the response critically, resolve important questions, and use it as a considered input to the next decision—not as an unchecked final answer.