A commitment does not fail the day you buy it. It usually fails much later, when nobody is watching the runway. Coverage drifts. Utilization drops. A term gets close to expiration. Renewal is left on autopilot or forgotten entirely. Then a clean savings story becomes a pay-as-you-go surprise.
At a glance |
One loop. Four signals. The goal is early correction, not late surprise.
Why this matters
Azure commitments are powerful, but they are billing instruments, not magic. Reservations discount matching resources for a fixed term. Savings plans discount eligible compute usage against an hourly commitment. Both can cut costs materially when your demand is steady. Both can also create blind spots when ownership is fuzzy or usage patterns change.
That is why I like the idea of commitment runway. It treats commitments like something you actively monitor, not something you buy once and forget. A healthy runway answers four questions fast:
· How much steady-state eligible usage is covered right now?
· How much of what we bought is actually being consumed?
· Which commitments are close enough to expiry to require a decision?
· Is renewal configured in a way that matches current reality, not last year’s reality?