Is this supply-constrained or demand-constrained process

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Reference no: EM132096208

After an “all night” study session the day before the last final exam, you and four other students from class decide to stop for some much-needed coffee at the campus Starbucks. They arrive at 8:30 a.m. and are dismayed to find a rather long line. Fortunately for the students, a Starbucks executive happens to be in line directly in front of them. From her, they learn the following facts about this Starbucks location: ?

There are three employee types:

o There is a single cashier who takes all orders, prepares nonbeverage food items, grinds coffee, and pours drip coffee.

o There is a single frozen drink maker who prepares blended and iced drinks.

o There is a single espresso drink maker who prepares espressos, lattes, and steamed drinks.

? There are typically four types of customers:

o Drip coffee customers order only drip coffee. This requires 25 seconds of the cashier’s time to pour the coffee.

o Blended and iced drink customers order a drink that requires the use of the blender. These drinks take on average 1.5 minutes of work of the frozen drink maker.

o Espresso drink customers order a beverage that uses espresso and/or steamed milk. On average, these drinks require 1 minute of work of the espresso drink maker.

o Ground coffee customers buy one of Starbucks’ many varieties of whole bean coffee and have it ground to their specification at the store. This requires a total of 1 minute of the cashier’s time (20 second to pour the coffee and 40 seconds to grind the whole bean coffee).

? The customers arrive uniformly at following rates from 7 a.m. (when the store opens) until 10 a.m. (when the morning rush is over), with no customers arriving after 10 a.m.:

o Drip coffee customers : 25 per hour.

o Blended and iced drink customers: 20 per hour.

o Espresso drink customers: 70 per hour.

o Ground coffee customers: 5 per hour.

? Each customer spends, on average, 20 seconds with the cashier to order and pay.

? Approximately 25 percent of all customers order food, which requires an additional 20 seconds of the cashier’s time per transaction.

While waiting in line, you and your friends reflect on these facts and with DSCI 303 fresh in mind to answer the following questions:

a) Is this a supply-constrained or demand-constrained process?

b) Which resource has the highest implied utilization? From your conversation with the executive, you and your friend learn that Starbucks is considering a promotion on all scones (half price!), which marketing surveys predict will increase the percentage of customers ordering food to 40 percent (the overall arrival rates of customers will not change). However, the executive is worried about how this will affect the waiting times of customers.

c) How do the levels of implied utilizations change as a response to this promotion?

Reference no: EM132096208

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