Build an opportunity sizing model you can adjust
Turn a sizing estimate into an artifact where the assumptions are visible and changeable.
What this prompt helps you do
An interactive model with adjustable assumptions, a resulting range, and the sensitivity of the result to each input.
When to use it
A sizing number is being quoted without the assumptions that produced it.
What to prepare
The goal, relevant source material, constraints, examples, and the decision or action this should support.
How to get a strong result
Make the assumptions the primary interface; a model that shows only its output invites false confidence.
How to use this prompt
Replace each placeholder with accurate context. Paste the complete prompt into Claude, review the response critically, resolve important questions, and use it as a considered input to the next decision—not as an unchecked final answer.