market-sizing

Estimate TAM, SAM, and SOM with top-down and bottom-up approaches.

5|2|Updated Mar 27, 2026
One-click install
npx skills add https://github.com/tarunccet/pm-skills --skill market-sizing-tarunccet
Or copy as Structured Prompt for Agent
Please help me install this Agent Skill.
Skill: market-sizing
Source: https://github.com/tarunccet/pm-skills/tree/main/pm-market-research/skills/market-sizing
Command: npx skills add https://github.com/tarunccet/pm-skills --skill market-sizing-tarunccet

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

Estimate market size and opportunity using TAM, SAM, and SOM with both top-down and bottom-up methods, enabling data-driven go-to-market decisions.

Core Features & Use Cases

  • Top-down market sizing to frame opportunity.
  • Bottom-up validation from unit economics and pricing.
  • SAM/SOM scoping for realistic market reach in 1-3 years.

Quick Start

Analyze a given market opportunity and produce TAM, SAM, and SOM with growth projections.

Frequently Asked Questions about 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 specific market segment?

Estimate TAM, SAM, and SOM by applying both top-down and bottom-up approaches to your geography, industry, and customer segments. This reconciles broad market opportunity with unit economics to produce data-backed market definitions and growth projections.

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

Top-down market sizing frames the total opportunity from industry-level data, while bottom-up sizing validates it from unit economics and pricing. Combining both methods reconciles market estimates and produces structured assumptions for realistic SAM and SOM scoping.

How do I scope SOM for realistic market reach in the first few years?

Scope SOM by analyzing your serviceable market and applying growth projections based on data-backed assumptions. This focuses on realistic market reach within 1-3 years by constraining the SAM through bottom-up unit economics and specific customer segments.

Can I generate growth projections and risk analysis from a bottom-up market sizing approach?

Yes, bottom-up market sizing generates growth projections alongside a structured set of key assumptions and risks. By validating unit economics and pricing against the target industry, it delivers data-backed forecasts and highlights potential market constraints.

When should I use a combined top-down and bottom-up approach for market opportunity analysis?

Use a combined approach for market opportunity analysis when making data-driven go-to-market decisions. Reconciling top-down industry views with bottom-up unit economics prevents overestimation and grounds your TAM, SAM, and SOM in actionable growth projections.

What inputs do I need to calculate TAM, SAM, and SOM accurately?

To calculate TAM, SAM, and SOM accurately, provide the target geography, industry, and customer segments. These inputs allow the sizing analysis to apply top-down and bottom-up methods, yielding reconciled market definitions and structured assumptions.