Market Sizing Analysis

---
name: market-sizing-analysis
description: This skill should be used when the user asks to "calculate TAM",
  "determine SAM", "estimate SOM", "size the market", "calculate market
  opportunity", "what's the total addressable market", or requests market sizing
  analysis for a startup or business opportunity.
metadata:
  version: 4.1.0-fractal
---

# Market Sizing Analysis

Comprehensive market sizing methodologies for calculating Total Addressable Market (TAM), Serviceable Available Market (SAM), and Serviceable Obtainable Market (SOM) for startup opportunities.

## Use this skill when

- Working on market sizing analysis tasks or workflows
- Needing guidance, best practices, or checklists for market sizing analysis

## Do not use this skill when

- The task is unrelated to market sizing analysis
- You need a different domain or tool outside this scope

## Instructions

- Clarify goals, constraints, and required inputs.
- Apply relevant best practices and validate outcomes.
- Provide actionable steps and verification.
- If detailed examples are required, open `resources/implementation-playbook.md`.

## Overview

Market sizing provides the foundation for startup strategy, fundraising, and business planning. Calculate market opportunity using three complementary methodologies: top-down (industry reports), bottom-up (customer segment calculations), and value theory (willingness to pay).

## Core Concepts

## 🧠 Knowledge Modules (Fractal Skills)

### 1. [The Three-Tier Market Framework](./sub-skills/the-three-tier-market-framework.md)
### 2. [When to Use Each Methodology](./sub-skills/when-to-use-each-methodology.md)
### 3. [Methodology 1: Top-Down Analysis](./sub-skills/methodology-1-top-down-analysis.md)
### 4. [Methodology 2: Bottom-Up Analysis](./sub-skills/methodology-2-bottom-up-analysis.md)
### 5. [Methodology 3: Value Theory](./sub-skills/methodology-3-value-theory.md)
### 6. [Step 1: Define the Market](./sub-skills/step-1-define-the-market.md)
### 7. [Step 2: Gather Data Sources](./sub-skills/step-2-gather-data-sources.md)
### 8. [Step 3: Calculate TAM](./sub-skills/step-3-calculate-tam.md)
### 9. [Step 4: Calculate SAM](./sub-skills/step-4-calculate-sam.md)
### 10. [Step 5: Calculate SOM](./sub-skills/step-5-calculate-som.md)
### 11. [Step 6: Validate and Triangulate](./sub-skills/step-6-validate-and-triangulate.md)
### 12. [SaaS Markets](./sub-skills/saas-markets.md)
### 13. [Marketplace Markets](./sub-skills/marketplace-markets.md)
### 14. [Consumer Markets](./sub-skills/consumer-markets.md)
### 15. [B2B Services](./sub-skills/b2b-services.md)
### 16. [For Investors](./sub-skills/for-investors.md)
### 17. [For Strategy](./sub-skills/for-strategy.md)
### 18. [Reference Files](./sub-skills/reference-files.md)
### 19. [Example Files](./sub-skills/example-files.md)