For each of the problems listed, determine the following quantities for each act
ID: 407708 • Letter: F
Question
For each of the problems listed, determine the following quantities for each activity: the earliest start time, latest start time, earliest finish time, latest finish time, and slack time. List the critical activities, and determine the expected duration of the project.
c.
Activity
Immediate
Predecessor
Estimated Time (days)
A
—
15
B
A
12
C
B
6
D
B
5
E
C
3
F
—
8
G
F
8
H
F
9
I
G
7
J
H
14
K
J
6
End
D, E, I, K
Summary:
Activity
ES
EF
LF
LS
Slack
A
B
C
E
D
F
G
I
H
J
K
Activity
Immediate
Predecessor
Estimated Time (days)
A
—
15
B
A
12
C
B
6
D
B
5
E
C
3
F
—
8
G
F
8
H
F
9
I
G
7
J
H
14
K
J
6
End
D, E, I, K
Explanation / Answer
Activity::::::Duration::::::EST::::::::::EFT:::::::::::LFT::::::::::::LST:::::::::::::Slack
A::::::::::::::::::15:::::::::::::::0:::::::::::0+15=15:::::0::::::::::::15-0=15:::::::::15-0=15
B::::::::::::::::::12:::::::::::15::::::::::15+12=27:::12:::::::::::12-12=0:::::::::::27-12=15
C::::::::::::::::::6::::::::::::12:::::::::::12+6=18::::18-6=12:::::12-6=6::::::::18-12=06
D::::::::::::::::::5::::::::::::12:::::::::::12+5=17::::17-5=12:::::12-5=7:::::::::17-12=05
E::::::::::::::::::3::::::::::::6:::::::::::::6+3=09:::::09-03=06::::6-3=3:::::::::::9-6=3
F::::::::::::::::::8::::::::::::0:::::::::::::0+8=08:::::08-08=0:::::::8-0=8:::::::::::8-0=8
G::::::::::::::::::8:::::::::::8::::::::::::::8+8=16::::16-8=8:::::::::8-8=0::::::::16-8=8
H::::::::::::::::::9:::::::::::8::::::::::::::8+9=17::::17-9=8:::::::::9-8=0::::::::17-8=9
I::::::::::::::::::7::::::::::::8::::::::::::::8+7=15::::15-7=8:::::::::8-7=0::::::::15-8=7
J::::::::::::::::::14::::::::::9:::::::::::::9+14=23:::23-14=9:::::9-14=6::::::::23-9=14
K::::::::::::::::::6:::::::::::14:::::::::::14+6=20:::20-6=14:::::14-6=8:::::::::20-14=06
_____________________________________________________________
List the critical activites:
A-B-C-E-I-K=15 +12 +6 +3+7+6=49
F-H-J-K=8+9+14 +6 =37
F-G-I=8+8+7=23
Project durataion:
A-B-C-E-I-K=15 +12 +6 +3+7+6=49 days
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