Customer service. Scenario 4 of 6. Fairness under pressure
The queue behind her
You are on the only open till. An elderly customer is paying with vouchers and coins and wants to chat. She is taking a long time. Eight people are queuing behind her, and one of them sighs loudly and checks his watch.
The principle
Every customer gets your full attention for their turn. When a queue builds, fix the queue: ask for help and speak to the people waiting. Do not rush the person in front of you.