Deck 10: Project Scheduling: Lagging, crashing, and Activity Networks

Question 1

Gantt charts cannot depict float.

Answer 1

False

Question 2

The most common type of logical sequencing between tasks is the ________ relationship.

Answer 2

finish to start

Question 3

________ represent one of the first attempts to develop a network diagram that orders project activities by baseline calendar dates.

Answer 3

Gantt charts

Question 4

In an actual project,one means of crashing critical path activities would be to perform at a lower level of quality.

Question 5

The critical path may not contain a dummy activity.

Question 6

In order to accelerate completion of a project,the manager must crash critical path activities.

Question 7

Quite often the marginal gains in employee productivity decrease dramatically with the increased use of overtime.

Question 8

Networks are adaptable and useful for all scheduling challenges that an organization faces.

Question 9

Most activity estimations using PERT methods lead to overly optimistic activity duration estimates.

Question 10

The logical relationship between the start and finish of one activity and the start and finish of another activity is the ________.

Question 11

Gantt charts can display early start or late start logic.

Question 12

Finish to start lags are the same as additional activity slack.

Question 13

The least common type of lag relationship occurs when a successor's finish is dependent upon a predecessor's start.

Question 14

Most project management software employs AOA diagramming

Question 15

For large projects,network diagrams are more useful if they are completely detailed.

Question 16

Start-to-start lags are becoming increasingly used as a means to accelerate projects through a process known as ________.

Question 17

AOA is a more useful technique than AON if the project is complex and has many significant milestones.

Question 18

A(n)________ relationship is appropriate where two or more linked activities must be completed before a successor is begun.

Question 19

Dummy activities are used in AOA networks to indicate the existence of precedent relationships between activities and their event nodes.

Question 20

Brook's Law states that the typical crashing decision to add more resources to an activity only delays the activity further.

Question 21

Each individual bar on a Gantt chart represents a(n)________.

Question 22

Activities A and B have a finish to finish relationship and early start and finish times as shown.What is the result of incorporating a 4-day lag between activities C and B?

A)The early finish for A increases to 31.
B)The early start time for A increases to 24.
C)The early finish time for B increases to 31.
D)The early start time for D falls to 23.

Question 23

The three principal methods for accelerating project activities are to change the ________,________,and ________ of the project resources.

Question 24

In analyzing crash options for project activities,each activity has a slope that is calculated as the ________ divided by the ________.

Question 25

The most common type of logical sequencing between tasks is referred to as the:

A)finish to start relationship.
B)finish to finish relationship.
C)start to start relationship.
D)start to finish relationship.

Question 26

An activity of duration zero whose sole purpose is to maintain network logic is a(n)________.

Question 27

Use the Gantt chart and the activity list to determine which resource is used the least.

A)Resource 1
B)Resource 3
C)Resource 4
D)Resource 2

Question 28

The horizontal axis for a Gantt chart is ________.

Question 29

The process of accelerating a project is referred to as ________.

Question 30

Which statement about this Gantt chart is best?

A)Activity a has a duration that could be as short as 1 day and as long as 10.
B)Activity b probably has activity a as a predecessor.
C)No progress has been made on activity c.
D)Activity d is the longest activity.

Question 31

PERT analysis is based on ________ estimates,which,if unreasonably determined,can lead to inaccurate and misleading project schedules.

Question 32

The primary drawback with ________ occurs when the project is very complex,with numerous paths through the model.

Question 33

If a project is extraordinarily complex,rather than showing every possible path through the network and every activity sequence,a(n)________ that shows only the key subroutines or network paths can be created.

Question 34

Use the Gantt chart and the activity list to determine when resource 5 is free.

A)between 0 and 15
B)between 15 and 30
C)between 30 and 45
D)between 45 and 60

Question 35

Consider the Gantt chart shown below where the time scale is in minutes and all activities are performed on an early start basis.How much slack is available in The Great Hair Washing project?

A)10 minutes
B)15 minutes
C)0 minutes
D)5 minutes

Question 36

What is the early start time for activity C if it has the start to start relationship shown?

A)day 20
B)day 25
C)day 27
D)day 29

Question 37

The two primary drawbacks to the use of overtime as a means of crashing a product are the ________ and the ________.

Question 38

A finish to start lag delay is usually shown:

A)as an added value in the predecessor's activity time.
B)on the line adjoining the two activity nodes.
C)as an added value in the predecessors early start time.
D)as a subtracted value in the follower's early finish time.

Question 39

Use the Gantt chart and the activity list to determine when resource 2 is free.

A)between 0 and 15
B)between 15 and 30
C)between 30 and 45
D)between 45 and 60

Question 40

Activity X has the start to finish relationship shown with activity Y and both have early start and finish times as shown.Which statement is best?

A)a < d
B)a < c
C)b < c
D)d < a

Question 41

Which of these approaches will NOT accelerate the completion of a project?

A)Improve the productivity of existing project resources.
B)Increase the bureaucratic oversight.
C)Improve the working method.
D)Increase the quantity of personnel and equipment.

Question 42

A 14-week construction activity requires a crane that rents for $1,000 per week and a crew of general laborers that costs $5,000 per week.In order to complete this activity within 10 weeks,you must hire additional general laborers at a cost of $2,000 per week.What is the slope for this activity?

A)$0 per week
B)$1,000 per week
C)$2,000 per week
D)$6,000 per week

Question 43

Use the Gantt chart and activity list to determine which resource has the greatest continual use.

A)Resource 4
B)Resource 2
C)Resource 3
D)Resource 5

Question 44

One reason for crashing a project is:

A)the project has slipped behind schedule.
B)that the initial schedule may be too pessimistic.
C)market needs change and the project is not in demand any more.
D)there are no repercussions for delivering the project late.

Question 45

Use the Gantt chart and activity list to determine which resource has the greatest continual use.

A)Resource 3
B)Resource 1
C)Resource 2
D)Resource 4

Question 46

Use the Gantt chart and the activity list to determine which resource is free for use in another project before the others.

A)Resource 4
B)Resource 3
C)Resource 1
D)Resource 2

Question 47

Use the Gantt chart and activity list to determine which resource is used the most.

A)Resource 4
B)Resource 2
C)Resource 1
D)Resource 5

Question 48

An activity performed by a subcontractor is scheduled for 20 weeks at an anticipated cost of $100,000.Due to slippage on the critical path you need to reduce this activity by three weeks.If the subcontractor informs you that the activity can be completed in 15 weeks for $200,000,what is the slope for the activity?

A)$20,000 per week
B)$33,333 per week
C)$5,000 per week
D)$13,333 per week

Question 49

A basic Gantt chart:

A)clearly displays early and late start and finish times for all activities.
B)cannot be used to track the project's progress.
C)permits scheduling resources well before they are needed.
D)shows dummy activities to preserve network logic.

Question 50

Use the Gantt chart and activity list to determine which resource is used the most.

A)Resource 1
B)Resource 2
C)Resource 4
D)Resource 5

Question 51

Given the cost information in the table,what is the cheapest activity to crash on a per week basis?

A)Activity A
B)Activity B
C)Activity C
D)Activity D

Question 52

The process of accelerating a project is referred to as:

A)streamlining.
B)expediting.
C)rushing.
D)crashing.

Question 53

Use the Gantt chart and activity list to determine which resource is used the least.

A)Resource 1
B)Resource 2
C)Resource 4
D)Resource 5

Question 54

Use the Gantt chart and the activity list to determine which resource is needed earliest in this project.

A)Resource 2
B)Resource 3
C)Resource 1
D)Resource 4

Question 55

Use the Gantt chart and activity list to determine when resource 3 is free.

A)between 0 and 10
B)between 10 and 20
C)between 20 and 30
D)between 30 and 40

Question 56

If an activity's cost is plotted against its duration on axes with zeros at the origin:

A)the slope of the line is positive because it costs more to finish an activity more quickly.
B)the slope of the line is negative because a shorter activity costs less than a longer one.
C)the slope of the line is negative because it costs more to finish an activity more quickly.
D)the slope of the line is positive because a longer activity costs more than a shorter one.

Question 57

Use the Gantt chart and activity list to determine which resource is released from this project for use in another project the earliest.

A)Resource 2
B)Resource 4
C)Resource 1
D)Resource 3

Question 58

The most common method for shortening activity durations involves the decision to:

A)eliminate bureaucracy.
B)alter the technology used in the activity.
C)assign more senior personnel to the activity.
D)increase project resources.

Question 59

Use the Gantt chart and the activity list to determine which resource is used the most.

A)Resource 4
B)Resource 3
C)Resource 1
D)Resource 2

Question 60

Use the Gantt chart and activity list to determine which resource is used the least.

A)Resource 4
B)Resource 2
C)Resource 1
D)Resource 3

Question 61

A project has the activity duration and cost information indicated in the table where all times are in weeks.What is the total cost for completing this project in 50 days?

A)$253,000
B)$237,000
C)$216,000
D)$207,000

Question 62

What is the late finish for activity D in the network shown in the diagram?

A)15
B)16
C)17
D)18

Question 63

An activity on an arrow network:

A)cannot have more arrows than nodes.
B)cannot have more nodes than arrows.
C)has one more node than arrows.
D)has one more arrow than nodes.

Question 64

Use the information in the table (all times are in days)to determine the lowest extra cost for an 18-day project.

A)$380
B)$400
C)$420
D)$440

Question 65

It costs $75 per day for each day that a construction crew is on site.The project manager determines that most activities can be crashed and has listed the crashing costs next to the minimum time for each activity.Use this information to determine the lowest cost for this project.All times given are in days.

A)$1,800
B)$1,770
C)$1,700
D)$1,630

Question 66

A project has the activity duration and cost information indicated in the table where all times are in weeks.There is a penalty of $250 per week for every week the project extends beyond 50 weeks.What is the cost of the least expensive project possible?

A)$18,100
B)$19,350
C)$17,416.67
D)$16,110

Question 67

A project has the activity duration and cost information indicated in the table where all times are in weeks.There is a penalty of $5,000 per week for every week the project extends beyond 45 weeks.What is the lowest total cost for completing this project?

A)$222,667
B)$217,000
C)$222,000
D)$208,000

Question 68

Dummy activities have a duration equal to the:

A)slack on the critical path.
B)length of the predecessor.
C)length of the successor.
D)lag needed to preserve network logic.

Question 69

A project has the activity duration and cost information indicated in the table where all times are in weeks.What is the lowest total cost for completing this project in 45 days?

A)$222,667
B)$243,675
C)$258,333
D)$272,500

Question 70

The critical path of this network is:

A)14.
B)15.
C)12.
D)13.

Question 71

Use the information in the table (all times are in days)to determine the lowest extra cost for a 20-day project.

A)$200
B)$130
C)$120
D)$100

Question 72

The fastest completion time for this project is:

A)14.
B)15.
C)16.
D)17.

Question 73

A project has the activity duration and cost information indicated in the table where all times are in weeks.There is a penalty of $250 per week for every week the project extends beyond 50 weeks.What is the duration of the least expensive project possible?

A)60 weeks
B)57 weeks
C)53 weeks
D)50 weeks

Question 74

The AOA network described by this table needs:

A)zero dummy activities.
B)one dummy activity.
C)two dummy activities.
D)three dummy activities.

Question 75

The AOA network described by this table needs:

A)zero dummy activities.
B)one dummy activity.
C)two dummy activities.
D)three dummy activities.

Question 76

A project has the activity duration and cost information indicated in the table where all times are in weeks.What is the lowest total cost for completing this project in 55 weeks?

A)$16,950
B)$15,000
C)$16,350
D)$15,350

Question 77

What information is NOT included in the nodes for an AOA network?

A)label
B)early start time
C)late finish time
D)early finish time

Question 78

Use the information in the table (all times are in days)to determine the lowest cost minimum completion time?

A)$1,040
B)$1,020
C)$740
D)$720

Question 79

A project has the activity duration and cost information indicated in the table where all times are in weeks.There is a penalty of $6,000 per week for every week the project extends beyond 40 weeks.What is the lowest total cost for completing this project?

A)$234,000
B)$255,600
C)$248,333
D)$252,000

Question 80

A project has the activity duration and cost information indicated in the table where all times are in weeks.What is the lowest total cost for completing this project in 40 days?

A)$242,667
B)$255,600
C)$263,333
D)$272,500