discover-market-sizing

Estimates TAM, SAM, and SOM using multiple sizing frameworks with confidence labels.

640|81|Updated Jan 9, 2026
One-click install
npx skills add https://github.com/product-on-purpose/pm-skills --skill discover-market-sizing
Or copy as Structured Prompt for Agent
Please help me install this Agent Skill.
Skill: discover-market-sizing
Source: https://github.com/product-on-purpose/pm-skills/tree/main/skills/discover-market-sizing
Command: npx skills add https://github.com/product-on-purpose/pm-skills --skill discover-market-sizing

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes references (resource) components.

What problem does it solve?

Product teams need defensible market-size estimates for investment cases, go/no-go decisions, and stakeholder pitches, but single-method guesses and unsourced numbers undermine credibility. This Skill produces a calibrated TAM/SAM/SOM range by running multiple sizing frameworks and grading every figure by source quality.

Core Features & Use Cases

  • Multi-Framework Sizing: Runs top-down, bottom-up, comparable company, and analogous market frameworks, then synthesizes where they converge and diverge.
  • Source-Graded Confidence: Every dollar figure traces to a cited source, a stated assumption, or a sensitivity range, with High/Medium/Low confidence labels.
  • Refusal Protocols: Refuses unbounded fabrication, ambiguous market definitions, and requests for a single definitive number, offering a labeled lower-confidence path instead.
  • Use Case: Before a Series B pitch, ask for a sizing of the AI meeting-notes category and receive a markdown report with top-down and bottom-up tables, sensitivity analysis, key assumptions, and next research steps.

Quick Start

Estimate the TAM, SAM, and SOM for our AI code-review tool sold to US companies with 50 or more engineers, using top-down and bottom-up methods with confidence labels.

Frequently Asked Questions about discover-market-sizing

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I estimate TAM, SAM, and SOM for a new product?

Define a precise market boundary, then run top-down sizing from industry reports and bottom-up sizing from customer counts times revenue per customer. Synthesize the frameworks into a calibrated range with confidence labels and a sensitivity analysis.

What is the difference between top-down and bottom-up market sizing?

Top-down sizing starts from published industry figures and filters down to your serviceable segment. Bottom-up sizing builds from unit economics, multiplying target customer counts by revenue per customer, and the two methods are compared for convergence.

Can I get a market size estimate without primary source data?

Yes, quick-estimate mode accepts explicitly stated assumptions instead of cited sources, but labels every figure Low or Medium confidence and widens sensitivity bands. It still refuses to produce numbers with no inputs or constraints at all.

When should I not use TAM SAM SOM market sizing?

Do not use it for internal-tool ROI cases, feature prioritization, or competitive positioning, which need different methods. You should also identify the target customer persona first before sizing a market.

Why is TAM not a revenue projection?

TAM represents total demand if 100 percent of theoretical customers bought, which is unrealistic as a forecast. Revenue projections should be derived from SOM, the achievable share within one to three years, and grown over time.