Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Operations Management > Exam 3 > Flashcards

Exam 3 Flashcards

1
Q

Why do Queues form?

A

Queues form when the Capacity rate is smaller than the Demand Rate

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Queues form from?

A

Variability (Customer Arrival and Service Time)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What is the implication of PK Formula?

A

Time in queue increases in Utilization Rate and Varivility of both arrival time and service time

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q 
#
                           /
OOO--->#--->OO-- #
                           \   #
How many phases? How many servers in second phase?
A

2 phases

3 servers in phase 2

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Service happens only when

A

Capacity and demand are available at the same time

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What is the benefit of serving the Shortest processing time first?

A

Reduces the average waiting time

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Which type of queue would use a first come first serve approach?

A

Single Queue

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

___/____/____

A

Distribution of time between arrivals (M,D)
Distribution of service time (M,D)
Number of servers (1,c)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Difference between M and D

A 
M= Random, exponentially distributed
D= Deterministic
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Difference between 1 and C

A 
1= Single Server
c= Multiple servers
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

The key feature of of Erlang Loss Model

A

Customer leaves if system is full, there is no queue

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Where can Erlang Loss model be applied

A

DVD rental- there is no wait for the movie if the movie is not there

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Throughput Rate assuming no demand loss

A

Throughput rate= minimum( Demand rate, Capacity Rate)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Throughput rate assuming demand loss:

A

Throughput Rate< minimum (demand rate, capacity rate)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

In a general waiting system, how do you reduce throughput loss?

A

Create buffer to keep customers

Decrease waiting time to avoid customer balking

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

What is customer balking

A

customers leaving after they join the queue due to long waiting time

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

Who determines tolerance limits?

A

Customers, Designers

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

Who determines control limits?

A

Producers, Quality Controllers

19
Q

What happens beyond tolerance limits?

A

Defects

20
Q

What happens beyond Control Limits?

A

Actions need to be taken

21
Q

When control limits are violated but tolerance limits are satisfied….

A

Need to check system

22
Q

Pull System

A

The production dynamic is initiated from demand part (make to order). Information flows from downstream to upstream. Baked Cookies

23
Q

Push System

A

The upstream station or suppliers initiate the production schedule (make to stock), information flows from upstream to downstream. MacBook’s

24
Q

Three levels of customer fulfillment:

A

Customer Service
Customer Satisfaction
Customer Success

25
Q

Customer Service

A

Fulfill basic service requirements

26
Q

Customer satisfaction

A

Meet or exceed customer expectations

27
Q

Customer Success

A

Assist customers in meeting their objectives, long-term relationship

28
Q

Basic Customer Service includes:

A

Product Availabilty
Lead-Time Performance
Service Reliability

29
Q

Product Availability: Unit Fill Rate

A

% of ordered units delivered= Units Delivered/Units Ordered

30
Q

Product Availability: Order Fill Rate

A

% of orders shipped complete= Orders delivered/ Orders Demand

31
Q

Lead Time

A

The time between start and end of an activity

32
Q

Service Reliabilty

A

No Errors: Damage free, right quantity, right time

Provide critical information of inventory and order status

33
Q

What kind of product can be outsourced?

A

The product NOT in the area of core competencies

Mature products with standard processes

34
Q

Tradeoff related to too few suppliers

A

Risk(shortage, lack of competition)

35
Q

Tradeoff related to too many suppliers

A

Complexity

36
Q

Which supplier do you chose in the weighted point model

A

Supplier with highest score

37
Q

Select supplier by online auction when

A

Price is the most important factor

38
Q

Select supplier by negotiation when

A

Requirement is complicated, supplier involved, complex start up (Divorce)

39
Q

How to manage the relationship with suppliers?

A

Share information

Performance monitoring and improvement

40
Q

Throughput Rate

A

How many customers served in a given amount of time

41
Q

r=

A

Arrival rate/Service Rate

42
Q

Throughput=

A

Arrival Rate(1-probability system is full)

43
Q

Average Waiting Time=

A

Average Length of Queue/Arrival Rate (Little’s Law)

44
Q

Score=

A

Weight X Rating

Operations Management (1 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2025 Bold Learning Solutions. Terms and Conditions