Question

At a local business school, there is a toasted submarine sandwich process that uses a conveyor-fed oven. ( See picture below) Alice is the sole operator of the sub making process. In the first step of the process, she spends 2 minutes putting various ingredients in the sub. Then, she puts the sub on a conveyor belt and, over a period of 12 minutes, the conveyor moves the sub from the beginning of the oven to the end of the oven, fully toasting it. After the sub comes out of the oven, Alice spends 1 minute slicing the sandwich and putting it in a box. At most, 5 subs can fit in the oven at once. The toasting time in the oven does not depend on the number of subs in the oven.
Required:
a. Draw a process-flow chart for the sandwich-making process.
b. Calculate the hourly capacity of this sandwich-making process.
c. Suppose another employee is hired to do the slicing and boxing, and Zeynep now only loads the sandwiches with the right ingredients. What is the hourly capacity of this process with the additional employee?

Answer 1

Answer:

b. 20 sandwiches

c. 25 sandwiches

Explanation:

1. I added this diagram of the flow chart as an attachment

2.

Hourly capacity of sandwich making process:

Time it makes to 1 sandwich: 2 + 12 + 1 = 15

The time alice spends when making one sandwich = 2 + 1 = 3

oven uses 12 minutes to process one sandwich, so in 12 minutes, alice can can make 12/3 sandwiches = 4

The Oven can take 5 subs at a time,

So in one hour, the making process

= 60/3 = 20 sandwiches

3.

To calculate Hourly capacity with additional employee:

Alice takes 2 minutes

Additional employees takes 1 minute

Oven uses 12 minutes to make one sandwich

It's only after every 2 minutes Alice can put one sandwich. The oven can take only 5 sandwiches.

So in an hour:

Since oven can take 5

Sandwiches at a time, therefore one sandwich takes,

12 / 5 = 2.4 minutes.

In 1 hour number we have number of processed sandwich as

60 / 2.4 = 25

At hourly capacity with additional employees we have 25 sandwiches