On-Call Program Evolution: Three Stages of Maturity

On-call programs are not equal. The maturity stage decides what investment yields what return.

Why stages exist

On-call programs evolve through recognisable stages. Naming the stage helps prioritise the right next investment instead of skipping foundations.

• Convergence. Programs converge on similar shapes as they mature; the stages are descriptive, not prescriptive.
• Stage diagnosis. Knowing which stage you are in tells you what investment yields the next return.
• Skip cost. Skipping stages produces brittle programs; the missing foundations show up as instability later.
• Honest assessment. Most teams overstate their stage; ask the team, not the manager, what stage you are in.

Stage 1: ad-hoc

• Whoever was on-call last is on-call now. No formal rotation. Tribal knowledge.
• Common in early-stage startups. Burns out the early hires.

Stage 2: structured

Stage 2 is where most mature teams sit. Formal rotations and documentation make the program sustainable; metric-driven tuning is the next horizon.

• Formal rotation. Named primary and secondary; published schedule; documented swap process.
• Documented runbooks. Per-alert runbooks linked from the page; on-call follows the doc, not memory.
• Alerting hygiene. Pages-per-shift tracked; noisy alerts pruned quarterly; signal-to-noise is a metric.
• Sustainable but improvable. The team is not on fire; the next gains come from data-driven tuning.

Stage 3: optimized

Stage 3 is rare and earned. Few teams reach it because the gap from Stage 2 is years of investment, not weeks of process.

• Quiet rotations. Most shifts are page-free; the team has tuned its way out of routine pages.
• Metrics-driven tuning. Pages-per-shift, MTTR, false-positive rate trended quarterly; targets adjusted with data.
• Structural compensation. On-call comp baked into total comp; leadership signal that the work is valued.
• Recruiting win. 'We treat on-call seriously' becomes a hiring asset; the program differentiates the team.

Antipatterns

• Stage 1 forever. Burnout grows.
• Skipping straight to Stage 3. Brittle without Stage 2 foundation.
• Stage 3 declared without earning it. Performative.

What to do this week

Three moves. (1) Apply this practice to your next on-call rotation. (2) Survey the team after one cycle. (3) Iterate based on feedback; the discipline is the cadence.