Could a Shorter Queue Actually Take Longer Than a Longer One?
Visible length and actual waiting time are not the same thing.
Yes. Queue length does not reveal basket size, service complexity, payment issues, or transaction speed.
People often estimate waiting time by counting the number of people ahead of them. In reality, service duration can vary dramatically.
A shorter queue may contain customers with large purchases, returns, special requests, or payment complications. Meanwhile, a longer queue might consist of customers completing very quick transactions.
Queueing theory distinguishes between queue length and service time because both influence total waiting time.
The shortest line often looks attractive. The hidden variable is processing speed. Waiting time depends on how quickly the queue moves, not simply how many people are standing in it.
