Question

Billy’s Hamburger Barn has a single drive-up window. Currently, there is one attendant at the window who takes the order (30–40 seconds), gathers up the food and bags it (30–120 seconds), and then takes the customer’s money (30–40 seconds) before handing the food to the customer. (**) Map the current process. What is the minimum cycle time? The longest cycle time? (***) Suppose Billy’s Hamburger Barn redesigns the process described in problem 11 so there are now two attendants. The first attendant takes the order. Once this step is finished, the first attendant then takes the money, and the second one gathers up and bags the food. If two of the process steps can now run in parallel (gathering the food and taking the money), what is the new minimum cycle time? What is the longest cycle time? What potential problems could arise by splitting the process across two individuals?

Answer 1

Answer:

For the serial process of one attendant we have:

Minimum cycle of the serial process = 3*30 = 90 s

Maximum cycle of the serial process = 2*40 + 120 = 200 s

For the parallel process of two attendants we have:

Minimum cycle of the parallel process = 2*30 = 60 s

Maximum cycle of the parallel process = 40 + 160

In a parallel flowchart, the food making subprocess is independent of the money collecting subprocess. Therefore, exiting the process even without the money collecting.

Explanation:

It is attached both process flowchart for easy understanding.