The shopper who says to himself, 'I've waited too long in this line. I don't really need to buy this product today,' and leaves the store is an illustration of which element of arrival behavior?

A queueing model is constructed so that queue lengths and waiting time can be predicted. is generally considered a branch of operations research because the results are often used when making business decisions about the resources needed to provide a service.
A queuing system is characterised by three components: Arrival process - Service mechanism - Queue discipline.

Related Test: Operations Management 101 Practice Test: Transportation Modeling