Task success rate
Tasks passing agreed acceptance rules divided by all evaluated tasks. Define treatment of partial and canceled work in advance.
Quality and time
Evaluate accuracy, completeness, supporting sources and end-to-end duration.
Human involvement
Track correction, review and supplementary effort, distinguishing required approval from failure recovery.
Cost per successful task
Total cost of the same evaluation set divided by successful tasks, including failures and retries. Add labor cost separately only when consistently estimated.
When calculation is unavailable
If no task succeeds, show that the metric cannot be calculated and explain why, rather than showing zero cost or infinite returns.
