Frameworks
Proofwork.
One idea holds these frameworks together: AI only counts when you can prove it — in the work, and in the P&L. The Ladder is where a firm sits. The Four Numbers are what proof is measured in. The Production Gap is where proof dies before reaching the books.
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The Delivery Model Ladder
A four-stage model for how service firms move from human-delivered to AI-native delivery. Each stage is defined by economic signature, not tooling.
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The Four Numbers
AI does not save a service firm time. It changes four numbers: cost to deliver, retention, margin, and revenue per person. Every implementation succeeds or fails on which of them it moves.
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The Production Gap
The eleven ways AI implementations die inside service firms, before they ever touch the P&L.