Refer to Exhibit 13.2. Based on this report what percent of the time is the barber busy cutting…

➤ How many customers wait on average for a haircut?
Average number waiting Lq = ρ²/(1−ρ) = (2/3)²/(1/3) = 4/3 ≈ 1.3333 customers. This value excludes the customer in service and represents the expected queue length in steady state. Use it to plan waiting area capacity and evaluate staffing needs.