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§29

ROI tracking

The justification engine. Without ROI numbers per agent, AI investment loses executive support quickly.

Per-agent ROI formula:

Net monthly value = (hours saved/month × loaded employee hourly cost)
                  + (revenue uplift attributable to agent)
                  - (LLM API cost + infra + observability + maintenance)

Required ROI fields in the registry:

  • Baseline (pre-agent) effort per task
  • Post-agent effort per task
  • Task volume / month
  • Loaded hourly cost of the employees doing the task
  • Monthly LLM + infra cost
  • Net monthly value
  • Payback period
  • Decision quality vs. human benchmark
  • HITL frequency trend

Reviewed quarterly. Agents below break-even for two consecutive quarters → retirement candidate.