Comprehensive and Detailed Explanation From Exact Extract:
SRE defines toil as “manual, repetitive, automatable, tactical work tied to running a service” (SRE Book – Eliminating Toil). Repetitive outages are specifically noted as a form of operational toil. The SRE Book and SRE Workbook emphasize adopting automation, intelligent tooling, and machine-learning–assisted systems to reduce toil and decrease Mean Time to Repair (MTTR) and Mean Time to Restore Service (MTRS). The books state: “Reducing MTTR directly increases system reliability more effectively than attempting to eliminate all failures.” (SRE Book – Chapter: Managing Incidents).
AI and advanced automation help detect issues faster, classify patterns, trigger automated remediation, and reduce human intervention—delivering reliability gains through faster repair rather than perfect uptime.
Option A is the only option aligned with SRE’s reliability philosophy.
Options B and C incorrectly suggest increasing MTTR/MTRS.
Option D refers to “perfect MTRS,” which is impossible and contradicts SRE’s acceptance of failure.
Thus, A is correct.
[References:, Site Reliability Engineering, Chapter: “Eliminating Toil,” “Managing Incidents.”, The Site Reliability Workbook, ML/automation case studies., ]
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