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Business model stress test
PL by Prompier Library
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Version 1 · updated Nov 10, 2026
Reviewed by moderator Prompier Library on Nov 10, 2026. Checked for personal data, secrets, risky instructions and a clear license.
About this prompt
Tests a business model against best, base and worst cases and lists the assumptions and early warning signs that matter most. Use before a launch, budget cycle or investment decision.
Prompt text
You are a strategy analyst. Your goal is to stress-test my business model and show where it would break.
Inputs:
- Business model summary: {{business_model}}
- Key numbers I know (price, costs, volumes, cash): {{key_numbers}}
- Planning horizon: {{time_horizon}}
- Biggest worries: {{main_concerns}}
Steps:
1. List the 5 to 8 assumptions the plan depends on most. Rank them by impact and by how uncertain they are.
2. Build three scenarios (best, base, worst). For each, state which assumptions change and by how much, using my numbers where given and clearly labelled ranges where not.
3. Walk through consequences for revenue, costs, cash and people in each scenario, qualitatively if numbers are missing.
4. Identify the single point of failure and the earliest sign that it is happening.
5. Propose mitigations and trigger points: if X happens, do Y.
Output format:
- Assumptions table: Assumption, Impact, Uncertainty.
- One short section per scenario.
- Early-warning indicators (up to 6).
- Recommended actions with owners and triggers.
Quality bar: never present invented figures as facts, label every estimate as an assumption, avoid false precision, and keep the answer under 650 words. This is analysis to support your judgment, not financial advice.
Variables
4 variables| Variable | What to enter | Example | Default |
|---|---|---|---|
| {{business_model}} | Summarise how the business makes money | Monthly meal-kit subscription for busy families, delivered weekly | — |
| {{key_numbers}} | Numbers you know: price, costs, volumes, cash | 45 per box, cost 31, 400 subscribers, 8% leave monthly, 60,000 cash | — |
| {{time_horizon}} | How far ahead to plan | Next 18 months | — |
| {{main_concerns}} | What worries you most | Food prices rising and subscribers cancelling in summer | — |
Try it
Live previewSummarise how the business makes money
Numbers you know: price, costs, volumes, cash
How far ahead to plan
What worries you most
Your finished prompt
You are a strategy analyst. Your goal is to stress-test my business model and show where it would break.
Inputs:
- Business model summary: {{business_model}}
- Key numbers I know (price, costs, volumes, cash): {{key_numbers}}
- Planning horizon: {{time_horizon}}
- Biggest worries: {{main_concerns}}
Steps:
1. List the 5 to 8 assumptions the plan depends on most. Rank them by impact and by how uncertain they are.
2. Build three scenarios (best, base, worst). For each, state which assumptions change and by how much, using my numbers where given and clearly labelled ranges where not.
3. Walk through consequences for revenue, costs, cash and people in each scenario, qualitatively if numbers are missing.
4. Identify the single point of failure and the earliest sign that it is happening.
5. Propose mitigations and trigger points: if X happens, do Y.
Output format:
- Assumptions table: Assumption, Impact, Uncertainty.
- One short section per scenario.
- Early-warning indicators (up to 6).
- Recommended actions with owners and triggers.
Quality bar: never present invented figures as facts, label every estimate as an assumption, avoid false precision, and keep the answer under 650 words. This is analysis to support your judgment, not financial advice.
Sample output
Assumptions
| Assumption | Impact | Uncertainty |
|---|---|---|
| 60% of trial users convert | High | High |
| Supplier price stays flat | Medium | Medium |
Worst case: conversion falls to about 30 percent (illustrative). Revenue halves while fixed costs stay, so cash runs short around month seven.
Early warning: trial-to-paid rate under 40 percent for two consecutive months.
Trigger: if the warning appears, pause hiring and review pricing.
An example the author shared. Your result will differ.
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