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

2. When to Use Each Methodology

3. Methodology 1: Top-Down Analysis

4. Methodology 2: Bottom-Up Analysis

5. Methodology 3: Value Theory

6. Step 1: Define the Market

7. Step 2: Gather Data Sources

8. Step 3: Calculate TAM

9. Step 4: Calculate SAM

10. Step 5: Calculate SOM

11. Step 6: Validate and Triangulate

12. SaaS Markets

13. Marketplace Markets

14. Consumer Markets

15. B2B Services

16. For Investors

17. For Strategy

18. Reference Files

19. Example Files