TAM / SAM / SOM Market Sizing

Produce both a bottom-up and a top-down analysis for every engagement. Both methods are required — they serve different purposes and must be reconciled. The goal is a defensible, sourced output — not a fast estimate.

When to use this skill

Trigger on any prompt that contains:

• "TAM", "SAM", "SOM", or "market size"
• "How big is the market for X"
• "Total addressable market", "serviceable market", "obtainable market"
• "Market sizing for [product/company]"
• Investor deck context requiring market opportunity quantification

Loading examples

Before calculating, check the examples/ directory for a file matching the product's category. Load the closest match to calibrate data sources, filter logic, and ACV anchors before you begin.