📋 Template
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Free
Intermediate
Even though your primary build should be bottom-up, you still want a top-down triangulation to check it, and this gives you a step-by-step method plus a template for that. It is honest that top-down is a sanity check, not the headline, and shows worked examples. Use it as the second number you compare against your bottom-up build.
Top-Down Market Sizing: Step-by-Step TAM, SAM, SOM (with Examples and Template)
From Data-Mania by Data-Mania
- Top-down is a cross-check, not your primary number
- When top-down and bottom-up roughly agree, the number is stronger
- Includes a template and worked examples to follow
