market-sizing

Estimates TAM, SAM, SOM using top-down and bottom-up approaches with explicit assumption mapping.

8|1|Updated Dec 28, 2025

Search Tags:#business strategy #market sizing #investor pitch #market opportunity #tam sam som #growth forecasting

Ready to run

npx skills add https://github.com/officebeats/beats-pm-kit --skill market-sizing-officebeats

💬 Prompt for ChatGPT / Claude Chat▼

Please help me install this Agent Skill.
Skill: market-sizing
Source: https://github.com/officebeats/beats-pm-kit/tree/main/.agent/skills/market-sizing
Command: npx skills add https://github.com/officebeats/beats-pm-kit --skill market-sizing-officebeats

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes references (resource) components.

What problem does it solve?

This Skill helps you precisely estimate the Total Addressable Market (TAM), Serviceable Addressable Market (SAM), and Serviceable Obtainable Market (SOM) for any product or business idea, providing a clear financial picture of market potential.

Core Features & Use Cases

TAM, SAM, SOM Calculation: Provides structured estimates for all key market sizing metrics.
Top-Down & Bottom-Up Analysis: Employs both estimation methodologies for robust validation.
Growth Forecasting: Projects market size evolution over the next 2-3 years.
Assumption Mapping: Clearly outlines the critical assumptions underpinning each estimate.
Use Case: Preparing for an investor pitch and need to demonstrate the market size for your new SaaS product in the e-commerce analytics space.

Quick Start

Use the market-sizing skill to estimate the market size for a new AI-powered project management tool targeting small businesses in North America.

Frequently Asked Questions about market-sizing

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

FAQPage Schema

How do I calculate TAM, SAM, and SOM for an investor pitch?▼

Estimating TAM, SAM, and SOM requires defining market boundaries and applying both top-down and bottom-up approaches to quantify your addressable market. This provides a clear financial picture of your market opportunity for an investor pitch, complete with explicit assumption mapping.

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

Top-down market sizing starts with broad industry totals and narrows down to your specific market, while bottom-up market sizing builds estimates up from unit economics and individual customer data. Using both methodologies provides robust validation for your market opportunity analysis.

How do I forecast market growth for a new SaaS product?▼

Forecasting market growth for a new SaaS product involves projecting market size evolution over the next 2-3 years using calculated TAM, SAM, and SOM data. This requires mapping explicit assumptions about market boundaries and serviceable obtainable markets to model future opportunities.

Can I estimate market size for a specific region like North America?▼

Yes, you can estimate market size for specific regions like North America by defining your market boundaries and scoping your serviceable addressable markets accordingly. The analysis accommodates geographic constraints to calculate accurate TAM, SAM, and SOM metrics for your target area.

How do I map assumptions when estimating market opportunity?▼

Mapping assumptions when estimating market opportunity requires clearly outlining the critical inputs underpinning your top-down and bottom-up calculations. This explicit assumption mapping ensures your TAM, SAM, and SOM projections are transparent and validated for investor pitches.

What's the best way to quantify market potential for an e-commerce analytics tool?▼

The best way to quantify market potential for an e-commerce analytics tool is applying top-down and bottom-up estimation methodologies to calculate TAM, SAM, and SOM. This structured approach validates your market opportunity and projects growth over the next few years.