60068,
Wise beancounters call this "cost-effectiveness".
The controller works and takes a break at the same time (hence 15 minutes late).
Doesn't turn the lights on until you request.
This way, electricity bill will be cheaper, thus incomes will be higher. Next year, overfly taxes will be lower or shareholders will be wealthier.
In the end, controller says "my mistake" because that's his duty to take the responsability...
I'm joking, of course
... (,am I not ?
)
Indeed, obvious single-controller-on-duty symptom.