Here’s a clear and easy difference between TTR and MTTR, especially useful for Incident/Problem/Service Management interviews:
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✅ TTR vs MTTR — Key Differences
🔹 1. TTR (Time To Resolve)
Definition: The total time taken to fully resolve an incident or issue—from the moment it is reported until it is completely fixed.
Focus: Measures actual resolution time for a single incident.
Used For:
Tracking how fast teams close individual incidents
SLA reporting
Customer experience metrics
Example:
An incident raised at 10:00 AM and resolved at 11:30 AM
➡️ TTR = 1 hour 30 minutes
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🔹 2. MTTR (Mean Time to Resolve / Repair / Restore)
Definition: The average time taken to resolve multiple incidents/issues.
Focus: Measures overall team performance and operational stability.
Used For:
Trend analysis
Operational KPIs
Process improvement
Example:
If 5 incidents took 20 hours total to resolve:
➡️ MTTR = 20 / 5 = 4 hours
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🔥 Key Difference Summary (Interview Ready)
Metric Meaning Focus Level
TTR Time to resolve one incident Individual resolution Ticket-level
MTTR Average time to resolve many incidents Team/process efficiency Overall performance
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💡 Simple Way to Remember
TTR = One issue resolution time
MTTR = Average resolution time of many issues