Before a run or period, estimate eligible volume, expected route, provider and operating cost, review demand, exception posture, and intended value signal. Afterward, compare actuals at the same grain. Variance may come from larger context, retries, source failures, provider changes, inaccessible records, more review, or weak attribution. Each cause suggests a different response and should not be compressed into one return figure.
Learning can update routing, model choice, cache use, prompts, source preparation, review sampling, staffing, or scope. Material changes should remain governed and tested. A system should not reduce review merely because review appears expensive, or avoid escalation to improve completion. Cost regulation remains subordinate to authority, quality, privacy, fairness, and the defined service outcome.