USE CASE
AI SaaS pricing, with the economics visible.
Set a defensible floor, design tier boundaries, and review the margin impact of real product behavior.
The commercial problem
A flat AI SaaS plan can look profitable at the average while long contexts, retries, and power users quietly consume the margin.
The economic mechanism
P90 connects the seven-layer cost model to request cost, gross margin, pricing floors, and tier boundaries so the plan is tested against the expensive tail.
A scenario worth modelling
A growth plan works for ordinary requests but loses headroom when a small cohort runs multi-step workflows. Compare its median and p90 cost before changing the allowance.
The p90 workflow
Configure the cost architecture, inspect the cost distribution, run a pricing scenario, and record the approved response in the decision log.
Product evidence
Seven-layer cost model
P50 and P90 cost views
Pricing floor and tier boundary calculations
Human-approved Decision Evidence