The Art of CTO On-Call Rotation Optimizer designs fair and sustainable on-call schedules considering timezone coverage, fatigue prevention, and team size constraints.
Frequently Asked Questions
How do you design a fair on-call rotation?
Fair on-call rotations distribute burden equally considering frequency (no one should be on-call more than one week in four), timing (weekend and holiday shifts should rotate fairly), and compensation (on-call pay or comp time for off-hours work). Use a minimum team size of 4-5 engineers per rotation to prevent burnout. Track on-call load metrics including pages per shift, after-hours interruptions, and time-to-acknowledge to identify and address inequities in actual burden versus scheduled burden.
What is the minimum team size for sustainable on-call?
The minimum sustainable team size for on-call is 4-5 engineers, which provides a 4-5 week rotation cycle. With fewer than 4 people, individuals are on-call too frequently (every 3 weeks or less), leading to burnout and attrition. For 24/7 coverage with follow-the-sun support, you need at least 2-3 engineers per timezone with adequate overlap. Teams below the minimum should consider shared on-call with adjacent teams, contracting with managed incident response services, or investing in automation to reduce alert volume.