Transcript Project Management

Analysing the AoA network
Project Management
(seminar)
Total Project Time
• The minimum time in which the project can
be completed.
• Calculation: forward pass
Forward pass:
calculating the earliest event times (EETs)
and the earliest start times (ESTs) of all
activities.
Earliest Finishing Time = EST + Duration
Critical path
• Path:
continuous series of project activities connected by logical
relationships as designated in the project schedule network
diagram.
• Critical path:
sequence of activities that has no float time, and that
determines the duration of the project. It is the longest path.
Activities on the critical path are the critical activities.
• The critical path can be identified by a backward pass,
calculating the Latest Event Times (LETs) and the Latest
Finishing Times (LFTs).
• Latest Starting Time = Latest Finishing Time - Duration
Activity times & event times
• EET = EST of all emerging activities
• LET = LFT of all entering activities
Deadline
1
EET
Duration
LET
Activity identifier
EET
2
LET
TPT & LET
0
1
0
14
a
TPT = 14
14
2
14
• Float on activity ‘a’:
20
0
1
6
14
a
Float: 6
14
2
20
4
22
8
?
d
?
6
5
24
10
?
e
44
Calculate the…
• EET of event 6
• LETs of event 4 and 5
• ESTs and EFTs of activity ‘d’ and ‘e’
4
22
8
26
d
34
6
5
24
10
24
e
•
•
•
•
34
EST and EFT of ‘d’: 22 and 30
EST and EFT of ‘e’: 24 and 34
LST and LFT of ‘d’: 26 and 34
LST and LFT of ‘e’: 24 and 34
10
a
10
10
12
?
b
8
c
15
20
25
?
30
?
35
?
25
10
a
10
10
12
17
b
8
c
15
20
25
20
30
22
35
18
25
Calculate all event and activity times
and the float-times, find the critical path:
Activity times for the previous diagram
Activity
A
B
C
D
E
G
H
J
K
EST
LST
EFT
LFT
Activity times for the previous diagram
Activity
EST
LST
EFT
LFT
A
0
8
16
24
B
0
0
20
20
C
0
21
30
51
D
20
20
35
35
E
20
29
30
39
G
35
36
38
39
H
35
35
51
51
J
16
24
31
39
K
38
39
50
51
Four characteristics of the
critical path
1.
2.
3.
4.
It starts at the first node
It is continuous
It ends at the last node
It has no float
Readings
• Lockyer – Gordon (2005) Chapter 13
Thanks for the attention!