Operations Management Process Analysis

In: Business and Management

Submitted By anakecil
Words 975
Pages 4
Homework #1 Solution
Process Analysis and Capacity Management
BUAD311- Operations Management
Fall 2014
Q1 (15 points) At a make-to-order hamburger shop, there is one worker who cooks patties, two workers who assemble burgers, and one cashier. The oven can cook patties in
4 minutes and the oven can cook up to 20 patties at one time. Each burger assembler can assemble a burger in 40 seconds. It takes the cashier 6 seconds to collect payment.
a) (5 points) What is the capacity of the hamburger restaurant in customers per minute?1 What is the bottleneck?
COOK: Cycle Time CT=(4/20) min/burgerCapacity=20/4 = 5 burgers/min
Capacity per worker=60/40 burgers/min Capacity of Assembly workstation= 2 workers* (60/40)=3 burgers/min
CASHIER: C T= 6 sec/b capacity=(1/6)*60=10 burgers/min
Assembly is the bottleneck.
b) (5 points) If two more burger assembler is hired, what is the capacity of the burger store? What is the bottleneck?
ASSEMBLE: 60/40 burgers/min * 4 = 6 burgers/min
Capacity = 5 burgers/min. Cooking is the bottleneck.
c) (5 points) Disregarding part b), if the restaurant buys another oven,2 what is the capacity of the restaurant? What is the bottleneck?
COOK: 5 burgers/min * 2 = 10 burgers/min
Capacity = 3 burgers per minute. Assembly is the bottleneck.
Q2 (25 points): Q 2.5 on page 42 of the textbook.
a) (10 points)
The hourly demand is 3 grilled veggie, 11 veggie only, and 4 cream cheese, with a total of 18 bagels.
To satisfy the hourly demand, the needed resource time for each resource is
1
2

Let’s assume one customer orders one burger.
The new oven’s capacity is the same as the existing one. Also one worker can operate two ovens.

1

CUT: 3*3 + 11*3 + 4*3 = 54 minutes util=54/60=0.9
GRILLED STUFF: 3*10 + 11*0 + 4*0 = 30 minutesutil=30/60=0.5
VEGGIE ON BAGEL: 3*5 + 11*5 + 4*0 = 70 minutesutil=70/60=1.167
CREAM CHEESE:…...

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