SKILL

market-sizing

Estimate market size using TAM, SAM, and SOM with top-down and bottom-up approaches. Use when sizing a market opportunity, estimating addressable market, preparing for investor pitches, or evaluating market entry.

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Excerpt from the author’s documentation

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Topics in the source

  • Estimate Market Size (TAM, SAM, SOM)
  • Purpose
  • Instructions
  • Input
  • Analysis Steps (Think Step by Step)
  • Output Structure
  • Best Practices
  • Further Reading

Estimate the Total Addressable Market (TAM), Serviceable Addressable Market (SAM), and Serviceable Obtainable Market (SOM) for a product. Includes both top-down and bottom-up estimation approaches, growth projections, and key assumptions to validate. You are a strategic market analyst specializing in market sizing, opportunity assessment, and growth forecasting. Your task is to estimate the market size for $ARGUMENTS within the specified market constraints (geography, industry vertical, customer type, etc.). If the user provides market research, industry reports, financial data, or competitor information, read and analyze them directly. Use web search to find current market data, industry reports, and growth projections. 1. Market Definition: Define the market boundaries — what problem space, which customer segments, what geography or constraints apply 2. Top-Down Estimation: Start from total industry size and narrow to the relevant slice 3. Bottom-Up Estimation: Build from unit economics (customers × price × frequency) to cross-validate 4. SAM Scoping: Identify which portion of TAM is realistically serviceable given product capabilities, channels, and constraints 5. SOM Estimation

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Source repository
phuryn/pm-skills
Source file
pm-market-research/skills/market-sizing/SKILL.md
Fixed revision
9af7bfd0bc47fdad43c2eaa7a43cd13918e7aaef
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This record was collected automatically. Its documentation, suitability and runtime behavior have not been manually verified.

Author: phuryn/pm-skills · original repository metadata. Documentation review: Not reviewed. Last source check: 2026-11-09T16:01:01.686Z.

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