Because an unfilled role does not appear on any invoice, it is easy to treat vacancies as savings. Operations leaders know better. Here is how the real cost accumulates.
Lost output is the obvious line
If a station produces $400 of margin per shift, a two-week vacancy costs $4,000 before anything else goes wrong. Line-constrained operations lose more: one missing operator can throttle a whole cell.
Overtime is the expensive bandage
Covering a vacancy with overtime pays 150% wages for 100% work — from people who are now more tired. Sustained overtime also reliably increases absence, which creates more vacancy. It is a loop.
The quiet costs compound
- Quality: rushed and fatigued crews produce more defects and rework.
- Safety: incident risk rises with fatigue and with untrained cover.
- Morale: your best people carry vacancies the longest — and are the most employable elsewhere.
Put a number on it
A simple formula: (daily margin per role) + (overtime premium paid) + (estimated quality/rework cost) x days vacant. Most plants that run this math once change how fast they escalate hiring.
Speed is a supplier decision
Our average time-to-fill is two days, with most roles filled in one. At that speed, vacancy stops being a cost category and becomes a blip.