Mean Time to Detect (MTTD) Definition | Technology & Learning Glossary

Term	Mean Time to Detect (MTTD)
Definition	style="margin:0;">Mean Time to Detect (MTTD) is the average time required to identify a security event or incident after it begins. Mean Time to Detect (MTTD) is a DevOps operations and reliability concept used to observe service behavior, respond to failures, and improve resilience over time.
Context & Usage	It is used as an operations metric for monitoring coverage, alert quality, and detection effectiveness. Site Reliability Engineering and operations teams use this concept to measure service health, investigate incidents, and turn operational learning into improvement. Related concepts include DevOps, Site Reliability Engineering, Observability and Incident Response. Additional Resource: Google Site Reliability Engineering Book.
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Mean Time to Detect (MTTD) Glossary Definition