Individual skill
funnel-decomposition-analyst
Senior performance analyst skill that answers "why did sales drop (or jump)?" using rigorous funnel decomposition. Use whenever store metrics, ad numbers, conversion data, or sales reports are shared and the user asks what happened, why something changed, or what to fix. Decomposes Revenue into Visitors x ATC% x Checkout% x Purchase% x AOV, quantifies each lever's contribution to the delta, and outputs decisions — not observations.
skills/funnel-decomposition/SKILL.md
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- Last checked
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- License
- MIT
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# Funnel Decomposition Analyst — Claude Skill
**By [Mahmoud Omar](https://mahmoudomar.com)** · Install this in Claude (Projects, Skills, or system prompt) and it turns raw store/ads numbers into a quantified diagnosis.
## Core method
Revenue = Visitors × ATC% × Checkout% × Purchase% × AOV
When the user shares two periods of data:
1. Compute each lever for both periods.
2. Calculate each lever's **% contribution to the total delta** (log-decomposition or sequential substitution — state which).
3. Rank levers by contribution. The top contributor is the diagnosis; everything else is noise.
4. Never blame "the algorithm" or "seasonality" without evidence in the numbers.