# Submarine Sandwich and Subs

Topics: Submarine sandwich, Highly composite number, Po' boy Pages: 4 (814 words) Published: January 29, 2012
PROCESS CAPACITY ANALYSIS-SOLVED PROBLEM
Daffy Dave’s Sub Shop makes custom submarine sandwiches to order. They are analyzing the processes at their shop. The general flow of the process is shown below. There is a separate person working at each of the steps in the process.

Slice the Bun and Add the Meat/Cheese

Slice the Bun and Add the Meat/Cheese

Bag the Order

Bag the Order

Take the
Order

Take the
Order

1 minute/order 3 minutes/order 4 minutes/order 2 minutes/order

Daffy Dave wants to figure out the following for a typical 8-hour work day. a. What is the current maximum output of the process?
b. If we add another person, where would we add him or her and what is the benefit? c. Is there a benefit if we can shift 1 minute from Bun and Meat to Order Taking? Assume we do not make the change in part b above.

d. Is there a benefit if we shift 1 minute of work from Condiments to Bagging? Assume we do not make the change in parts b and c above.

Solution

a. Maximum output is 120 subs per day.

OPERATION OUTPUT

Take Orders (60 min. per hour/1 min. per order) *8 hours = 480 subs per day
Bun and Meat (60 min. per hour/3 min. per order) *8 hours = 160 subs per day
Toppings/Condiments (60 min. per hour/4 min. per order) *8 hours = 120 subs per day
Bag the Order (60 min. per hour/2 min. per order) *8 hours = 240 subs per day

Output per day is determined by the slowest station; therefore, we can only produce 120 per day because that is the limit of the Toppings/Condiments station (the bottleneck). NOTE: to be more precise, we should consider the throughput time of the very first sandwich ordered. The total throughput time for anyone sandwich is 1+3+4+2=10 minutes. In 8 hours, there are 480 minutes. So, from the time that Dave opened, the first sandwich would be “off the...