Reducing MTTD For High-Severity Incidents

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About the Authors

  • Jordan Pritchard

    Director of Infrastructure & Site Reliability Engineering
    Samba TV
  • Michael Kehoe

    Architect of reliable, scalable infrastructure
  • Rodney Lester

    Technical Lead, Reliability Pillar of Well Architected Program
    Amazon Web Services

  • Tammy Butow

    Principal SRE
  • Jay Holler

    Manager, Site Reliability Engineering
  • Ramin Keene


Get an introduction to the fundamentals of incident management classification and explore methods for reducing the time it takes SRE teams to discover their downstream effects.

This ebook dives into:
  • Incident classification: SEV descriptions and levels, and SEV and time-to-detection (TTD) timelines
  • Organization-wide critical service monitoring, including key dashboards and KPI metrics emails
  • Service ownership and metrics for organizations maintaining a microservices architecture
  • Effective on-call principles for site reliability engineers, including rotation structure, alert threshold maintenance, and escalation practices
  • Chaos Engineering practices to identify random and unpredictable behavior in your system
  • Monitoring and metrics to detect incidents caused by self-healing systems
  • Creating a high-reliability culture by listening to people in your organization

For companies such as Amazon, Dropbox, and Gremlin, the term high severity incident (SEV) signifies drops in network availability, product feature issues, data loss, revenue loss, and security risks. These high-impact bugs occur when coding, automation, testing, and other engineering practices create issues that eventually reach the customer—issues that can exist without detection for hours, days, weeks, and even years.

With this in-depth ebook, SREs, SRE managers, VPs of engineering, and CTOs will learn powerful methods for reducing MTTD through incident classification and leveling, tooling, monitoring, KPI metrics, alerting, observability, and Chaos Engineering. The authors share real-life experiences to explain how they achieved MTTD reduction results for companies including Gremlin, LinkedIn, Twitter, Amazon Web Services, Fuzzbox, and Samba TV.

Over a decade of collective experience unleashing chaos at companies like

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