- Washroom service interval during peak hours (target: under 45 minutes).
- Consumable stock-outs per month (target: zero).
- Supervisor inspection score, sampled weekly per floor.
- Time-to-close for tenant tickets raised to the help desk.
- Staff attendance and replacement time on no-show days.
Each of these is cheap to measure and hard to fake. Review them monthly with your provider, and insist that the report comes with photographs and timestamps.

