What is a follow-the-sun on-call rotation?

A follow-the-sun on-call rotation distributes 24/7 incident coverage among teams in different time zones, allowing engineers to respond during local daylight hours rather than being paged overnight. Its principal benefit is improved well-being and potentially more effective response from rested engineers, but it shifts operational risk to regional handoffs, where incomplete context can delay resolution and increase mean time to resolution. The model is best suited to distributed teams with sufficient regional staffing, mature runbooks, clearly documented service ownership, formal overlap windows, and primary, secondary, and cross-region escalation roles. It handles repeatable, documented response tasks more effectively than complex, novel incidents that require deep historical context and judgment. Successful implementations rely on written and synchronous handoffs that capture incident status, recent changes, concerns, and operational gaps, while requiring explicit acceptance when responsibility changes during active severe incidents. Common challenges include uneven expertise between regions, informal or fragmented processes, and tools that only manage schedules rather than preserving incident context. The article argues that automated remediation can reduce alerts from known failures, while Slack-native incident-management tooling, automated timelines, call transcription, and AI-assisted investigations can help incoming teams regain context; it also promotes incident.io’s paid platform as a solution for coordinating such rotations.

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