2. During the lunch-hour rush, the arrival rate may well exceed the service rate in a fast-food restaurant. But waiting times never approach infinity. Why not? (Hint: Think about the logic underlying the overtime viscious cycle in Figure 1.6.) 2. During the lunch-hour rush, the arrival rate may well exceed the service rate in a fast-food restaurant. But waiting times never approach infinity. Why not? (Hint: Think about the logic underlying the overtime viscious cycle in Figure 1.6.)