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MTTI (Mean Time to Intervention)

Canonical definition (Arco Lexicon)

The average time between required human interventions in an agentic system. Arco's target is greater than 72 hours.

Extended Definition​

Mean Time to Intervention is the primary operational health metric for an Arco business. It measures how long the core system runs autonomously before a human decision is required. A higher MTTI indicates a more architecturally robust system.

Arco targets an MTTI greater than 72 hours for all core revenue loops. Ancillary processes (reporting, communications, minor workflows) may have lower MTTI thresholds.

MTTI should not be confused with uptime or availability. A system can be fully available but require constant human steering — that is not autonomous. MTTI specifically measures the frequency of required human judgement, not system health.

First used: 2026-03-15

Part of the Arco Lexicon Ecosystem — maintained by Arco Venture Studio