Melissa's Photo Studio offers both individual and group portrait options. The process flow diagram in Figure 5.10 shows that all customers must first register and then pay at one of two cashiers. Then, depending on whether they want a single or group portrait they go to different rooms. Finally, everyone picks up their own finished portrait.

a. How long does it take to complete the entire process for a group portrait?

b. What single activity is the bottleneck for the entire process, assuming the process receives equal amounts of both groups and individuals?

c. What is the capacity of the bottleneck for both groups and individuals?

Cashier A Individual portrait taken (5 min) (15 min) Registration Pick up portrait (5 min) (7 min) Cashier B Group portrait taken (7 min) (20 min) FIGURE 5.10 A Process Flow for Melissa's Photo Studio