Question 1

-Use the network diagram and activity lengths in the nodes to determine the early start time for activity D.

Accepted Answer

A)  8
B)  13
C)  14
D)  21 C

Question 2

Use the information in the table to determine the early finish time for Activity D. $$\begin{array} { | l | l | l | l | l | l | l | } 
\hline & & & \text { Early } & \text { Early } & \text { Late } & \text { Late } \
 \text { Task } & \text { Predecessor } & \text { Duration } & \text { Start } & \text { Firish } & \text { Start } & \text { Firish } \
\hline \mathrm { A } & \mathrm { -- } & \mathbf { 8 } & & & & \
\hline \mathrm { B } & \mathrm { A } & & & & 14 & \
\hline \mathrm { C } & \mathrm { A } & & & \mathbf { 2 3 } & \mathbf { 8 } & \
\hline \mathrm { D } & \mathrm { C } , \mathrm { B } & 6 & \mathbf { 2 3 } & & \mathbf { 2 6 } & \
\hline \mathrm { E } & \mathrm { C } & & & \mathbf { 3 2 } & & \
\hline \mathrm { F } & \mathrm { D } , \mathrm { E } & & \mathbf { 3 2 } & & & \mathbf { 3 8 } \
\hline
\end{array}$$

Accepted Answer

A)  Day 23
B)  Day 26
C)  Day 29
D)  Day 32  C

Question 3

The amount of time an activity may be delayed from its early start without delaying the finish of the project is the:

Accepted Answer

A)  Delay.
B)  Float.
C)  Late start.
D)  Late finish. B

Question 4

Use the values in the table to calculate activity durations and variances for the project.Which path is critical? How closely should the other path be watched and why?
 $$\begin{array} { | l | l | l | l | l |} 
\hline \text { Activity } & \text { Predecessor } & \text { Optirnistic } & \text { Likely } & \text { Pessimistic } \
\hline \text { A } & -- & 5 & 7 & 10 \
\hline B & \text { A } & 4 & 6 & 9 \
\hline \mathrm { C } & \text { A } & 10 & 13 & 18 \
\hline \mathrm { D } & \mathrm { B } & 3 & 11 & 15 \
\hline \mathrm { E } & \mathrm { C } , \mathrm { D } & 2 & \boldsymbol { 3 } & 5 \
\hline
\end{array}$$

Accepted Answer

The answer of Use the values in the table to...

Question 5

A gentleman farmer maniacally works on academic projects to raise funds for his true passion,farming.He has identified seven tasks and developed three time estimates (all in days)of the next big project on the farm,replacing the fence at the comedy pasture.Tasks,precedence requirements,and time estimates are shown in the table.What is the probability that the project is completed in 31 days? $\begin{array}{|l|l|l|l|l|}
\hline \text { Activity } & \begin{array}{l}
\text { Optimistic } \
\text { time }
\end{array} & \begin{array}{l}
\text { Most Likely } \
\text { time }
\end{array} & \begin{array}{l}
\text { Pessimistic } \
\text { time }
\end{array} & \text { Predecessor } \
\hline \text { Corner Posts } & 4 & 5 & 6 & \text { - } \
\hline \text { String Line } & 7 & 8 & 9 & - \
\hline \text { Dig Holes } & 10 & 12 & 14 & \text { Corner Posts } \
\hline \text { Plant Posts } & 11 & 14 & 17 & \text { String Line } \
\hline \text { Weld Top Bar } & 8 & 11 & 14 & \text { String Line } \
\hline & &  &  & \text { Dig Holes, Plant } \
 \text { Paint } & 9 & 11 & 13 & \text { Posts } \
\hline \text { Tack Wire } & 9 & 12 &16& \text { Weld Top Bar } \
\hline
\end{array}$

Accepted Answer

A)  0.055
B)  0.092
C)  0.125
D)  0.187

Question 6

Use the information in the table to sketch the network and compute early and late start times.
 $$\begin{array} { | l | l | l |} 
\hline \text { Activity } & \text { Time } & \text { Predecessor } \
\hline \mathrm {  A } & 8 & \
\hline\mathrm {  B} & 4 & \text { A } \
\hline \mathrm { C } & 5 & \mathrm {~B} , \mathrm {~F} \
\hline \mathrm { D } & 12 & \mathrm {~A} \
\hline \mathrm { E } & 8 & \mathrm { D } \
\hline \mathrm { F } & 4 & \mathrm { D } \
\hline \mathrm { G } & 9 & \mathrm { E } , \mathrm { F } \
\hline
\end{array}$$

Accepted Answer

The answer of Use the information in the table to...

Question 7

Based on the activity network pictured,what is the BEST statement?

Accepted Answer

A)  Activity C is a burst activity.
B)  Activity E has one predecessor,Activity B.
C)  Activity A and Activity C are merge activities.
D)  There are no serial activities in this network.

Question 8

An activity has an optimistic time estimate of 17 days,a most likely estimate of 22 days,and a pessimistic estimate of 32 days.What is the expected duration of the activity?

Accepted Answer

A)  22.83 days
B)  23.67 days
C)  24.33 days
D)  25.17 days

Question 9

A merge activity has two or more immediate predecessors.

Accepted Answer

A) True 
 B)False

Question 10

The PERT technique assumes that durations are more deterministic.

Accepted Answer

A) True 
 B)False

Question 11

Compute early and late start and finish times for the network shown.

Accepted Answer

The answer of Compute early and late start and finish...

Question 12

Float is always measured in exactly the same way as slack.

Accepted Answer

A) True 
 B)False

Question 13

What is the earliest that Activity D can begin if Activity A takes 3 days,Activity B takes 5 days,and Activity C takes 7 days?

Accepted Answer

A)  Day 15
B)  Day 7
C)  Day 5
D)  Day 3

Question 14

What is the slack time for Activity D given the activity times and precedence requirements shown in the table? $$\begin{array} { | l | l | l | } 
\hline \text { Activity } & \text { Time } & \text { Predecessor } \
\hline  \mathrm { A } & 5 & - - \
\hline  \mathrm {B} & 7 &- - \
\hline \mathrm { C } & 8 & \text { A } \
\hline \mathrm { D } & 7 & \mathrm {~A} \
\hline \mathrm { E } & 4 & \mathrm {~B} \
\hline \mathrm { F } & 8 & \mathrm { C } , \mathrm { D } \
\hline \mathrm { G } & 9 & \mathrm { E } , \mathrm { F } \
\hline \mathrm { H } & 7 & \mathrm { G } \
\hline
\end{array}$$

Accepted Answer

A)  2
B)  1
C)  0
D)  3

Question 15

The late start time should be calculated using a forward pass through the network.

Accepted Answer

A) True 
 B)False

Question 16

What is the slack time for Activity B given the activity times and precedence requirements shown in the table? $$\begin{array} { | l | l | l | } 
\hline \text { Activity } & \text { Time } & \text { Predecessor } \
\hline  \mathrm { A } & 5 & - - \
\hline  \mathrm {B} & 7 &- - \
\hline \mathrm { C } & 8 & \text { A } \
\hline \mathrm { D } & 7 & \mathrm {~A} \
\hline \mathrm { E } & 4 & \mathrm {~B} \
\hline \mathrm { F } & 8 & \mathrm { C } , \mathrm { D } \
\hline \mathrm { G } & 9 & \mathrm { E } , \mathrm { F } \
\hline \mathrm { H } & 7 & \mathrm { G } \
\hline
\end{array}$$

Accepted Answer

A)  10
B)  9
C)  8
D)  7

Question 17

Use the information in the table to determine the late finish time for Activity B. $$\begin{array} { | l | l | l | l | l | l | l | } 
\hline & & & \text { Early } & \text { Early } & \text { Late } & \text { Late } \
 \text { Task } & \text { Predecessor } & \text { Duration } & \text { Start } & \text { Firish } & \text { Start } & \text { Firish } \
\hline \mathrm { A } & \mathrm { -- } & \mathbf { 8 } & & & & \
\hline \mathrm { B } & \mathrm { A } & & & & 14 & \
\hline \mathrm { C } & \mathrm { A } & & & \mathbf { 2 3 } & \mathbf { 8 } & \
\hline \mathrm { D } & \mathrm { C } , \mathrm { B } & 6 & \mathbf { 2 3 } & & \mathbf { 2 6 } & \
\hline \mathrm { E } & \mathrm { C } & & & \mathbf { 3 2 } & & \
\hline \mathrm { F } & \mathrm { D } , \mathrm { E } & & \mathbf { 3 2 } & & & \mathbf { 3 8 } \
\hline
\end{array}$$

Accepted Answer

A)  Day 17
B)  Day 20
C)  Day 23
D)  Day 26

Question 18

Activities C,D,and E in the project represented by the network are to be hammocked.What are the late start and early finish times of the hammock activity?

Accepted Answer

A)  6,24
B)  6,26
C)  8,24
D)  8,26

Question 19

An activity has a pessimistic time that is four times as long as its most likely time and six times as long as its optimistic time.If the activity variance is 12,what is the expected time?

Accepted Answer

A)  About 8 days
B)  About 9 days
C)  About 10 days
D)  About 11 days

Question 20

Network logic suggests that:

Accepted Answer

A)  Activity D can start any time.
B)  Activity A must be complete before Activity B can be done.
C)  Activities A,B and C must be complete before Activity D can be done.
D)  Activity C must begin before Activity B begins.

Exam 9: Project Scheduling: Networks, Duration Estimation, and Critical Path

-Use the network diagram and activity lengths in the nodes to determine the early start time for activity D.

The amount of time an activity may be delayed from its early start without delaying the finish of the project is the:

Based on the activity network pictured,what is the BEST statement?

An activity has an optimistic time estimate of 17 days,a most likely estimate of 22 days,and a pessimistic estimate of 32 days.What is the expected duration of the activity?

A merge activity has two or more immediate predecessors.

The PERT technique assumes that durations are more deterministic.

Compute early and late start and finish times for the network shown.

Float is always measured in exactly the same way as slack.

What is the earliest that Activity D can begin if Activity A takes 3 days,Activity B takes 5 days,and Activity C takes 7 days?

The late start time should be calculated using a forward pass through the network.

Activities C,D,and E in the project represented by the network are to be hammocked.What are the late start and early finish times of the hammock activity?

An activity has a pessimistic time that is four times as long as its most likely time and six times as long as its optimistic time.If the activity variance is 12,what is the expected time?

Network logic suggests that: