Transcript Critical Path Method Farrokh Alemi, Ph.D. Purpose of CPM    Course on Project Management Finish fast Quantify progress Communicate effectively.

Critical Path Method
Farrokh Alemi, Ph.D.
Purpose of CPM
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Course on Project Management
Finish fast
Quantify progress
Communicate effectively
Advantages and Disadvantages of
Formal Schedules
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Saves time and money on large
complex projects
Effective communication tool
Too much work
Assessment of duration of tasks
 Assessment of interdependencies
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Course on Project Management
Resource Oriented and Time
Oriented Schedules
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Course on Project Management
Resource oriented
Time oriented
Elements of a Critical Path
Chart
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Course on Project Management
Activity
Precedence
Duration/cost
Elements of a Critical Path
Chart
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Activity
Precedence
Duration/cost
Activity
Course on Project Management
Description
A
Select satisfaction survey tool
B
Print survey tool
C
Obtaining list of patients
D
Sample from list
E
Mail surveys to selected patients
F
Collect responses
G
Analyze data
Elements of a Critical Path
Chart
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Course on Project Management
Activity
Precedence
Duration/cost
Elements of a Critical Path
Chart
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Activity
Precedence
Duration/cost
Activity
Course on Project Management
Description
Precedents
A
Select satisfaction survey tool
B
Print survey tool
C
Select list of patients
D
Sample from list
C
E
Mail surveys to selected patients
D
F
Collect responses
E
G
Analyze data
F
A
Elements of a Critical Path
Chart
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Course on Project Management
Activity
Precedence
Duration/cost
Elements of a Critical Path
Chart
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Activity
Precedence
Duration/cost
Activity
Course on Project Management
Description
Precedents
Duration
A
Select satisfaction survey tool
2 weeks
B
Print survey tool
C
Select list of patients
D
Sample from list
C
1 week
E
Mail surveys to selected patients
D
2 weeks
F
Collect responses
E
4 weeks
G
Analyze data
F
3 weeks
A
3 weeks
1 week
Branch and Node Charts
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Course on Project Management
Activity on branch
Activity on node
Activity In Node
Course on Project Management
A
B
E
C
D
Activity
Description
F
G
Precedents
A
Select satisfaction survey tool
B
Print survey tool
C
Obtain list of patients
D
Sample from list
E
Mail surveys to selected patients
F
Collect responses
E
G
Analyze data
F
A
C
D,B
Activity On Branches
A
1
3
B
5
E
6
F
7
G
End
Start
C
2
Activity
Course on Project Management
4
D
Description
Precedents
A
Select satisfaction survey tool
B
Print survey tool
C
Obtain list of patients
D
Sample from list
E
Mail surveys to selected patients
F
Collect responses
E
G
Analyze data
F
A
C
D,B
Earliest and Latest Start and
Finish Times
A
2
B
3
E
2
Start
C
Activity
Course on Project Management
1
D
1
Description
A
Select satisfaction survey tool
B
Print survey tool
C
Select list of patients
D
Sample from list
E
Mail surveys to patients
F
Collect responses
G
Analyze data
F
4
G
3 End
Earliest and Latest Start and
Finish Times
Forward pass calculates early start and finish
A
2
B
3
E
2
Start
C
Activity
Course on Project Management
1
D
1
Description
A
Select satisfaction survey tool
B
Print survey tool
C
Select list of patients
D
Sample from list
E
Mail surveys to patients
F
Collect responses
G
Analyze data
F
4
G
3 End
Earliest and Latest Start and
Finish Times
Backward pass calculates latest start and end times
A
2
B
3
E
2
Start
C
Activity
Course on Project Management
1
D
1
Description
A
Select satisfaction survey tool
B
Print survey tool
C
Select list of patients
D
Sample from list
E
Mail surveys to patients
F
Collect responses
G
Analyze data
F
4
G
3 End
Earliest and Latest Start and
Finish Times
Critical Path includes activities where earliest start
3
A 2time and
E 2timeFare4equal
G 3 End
B latest finish
Start
C
Activity
Course on Project Management
1
D
1
Description
A
Select satisfaction survey tool
B
Print survey tool
C
Select list of patients
D
Sample from list
E
Mail surveys to patients
F
Collect responses
G
Analyze data
Earliest and Latest Start and
Finish Times
Activities not on the critical path have “slack.”
The latest
finish 3time and the
earliest
date
4 start
A 2
E 2
G 3 End
B
F
are different
Start
C
Activity
Course on Project Management
1
D
1
Description
A
Select satisfaction survey tool
B
Print survey tool
C
Select list of patients
D
Sample from list
E
Mail surveys to patients
F
Collect responses
G
Analyze data
Earliest and Latest Start and
Finish Times
Start
Early
Finish
0
Late
A
2
B
3
E
2
Start
C
Activity
Course on Project Management
1
D
1
Description
A
Select satisfaction survey tool
B
Print survey tool
C
Select list of patients
D
Sample from list
E
Mail surveys to patients
F
Collect responses
G
Analyze data
F
4
G
3 End
Earliest and Latest Start and
Finish Times
Early
Start
Finish
0
2
Late
A
2
B
3
E
2
Start
C
Activity
Course on Project Management
1
D
1
Description
A
Select satisfaction survey tool
B
Print survey tool
C
Select list of patients
D
Sample from list
E
Mail surveys to patients
F
Collect responses
G
Analyze data
F
4
G
3 End
Earliest and Latest Start and
Finish Times
E
S
F
0
2
Early
Start
Finish
2
5
Late
L
A
2
B
3
E
2
Start
C
Activity
Course on Project Management
1
D
1
Description
A
Select satisfaction survey tool
B
Print survey tool
C
Select list of patients
D
Sample from list
E
Mail surveys to patients
F
Collect responses
G
Analyze data
F
4
G
3 End
Earliest and Latest Start and
Finish Times
E
S
F
0
2
E
L
S
F
2
5
L
2
A
B
3
E
2
F
4
G
3 End
Start
1
C
Early
Late
Course on Project Management
D
Start
Finish
2
5
1
Activity
Description
A
Select satisfaction survey tool
B
Print survey tool
C
Select list of patients
D
Sample from list
E
Mail surveys to patients
F
Collect responses
G
Analyze data
Earliest and Latest Start and
Finish Times
E
S
F
0
2
E
L
S
F
2
5
L
2
A
B
3
E
2
F
4
G
3 End
Start
1
C
E
L
Course on Project Management
S
F
0
1
D
1
Start
Early
Late
1
Finish
Activity
2
Description
A
Select satisfaction survey tool
B
Print survey tool
C
Select list of patients
D
Sample from list
E
Mail surveys to patients
F
Collect responses
G
Analyze data
Earliest and Latest Start and
Finish Times
E
S
F
0
2
E
L
S
F
2
5
Early
Finish
5
7
Late
L
2
A
Start
3
B
E
2
F
4
G
3 End
Start
1
C
E
L
Course on Project Management
S
F
0
1
1
D
E
L
S
F
1
2
Activity
Description
A
Select satisfaction survey tool
B
Print survey tool
C
Select list of patients
D
Sample from list
E
Mail surveys to patients
F
Collect responses
G
Analyze data
Earliest and Latest Start and
Finish Times
E
S
F
0
2
E
L
S
F
2
5
E
L
F
5
7
L
2
A
S
3
B
E
S
F
7
11
E
L
E
2
S
F
11
14
L
F
4
G
3 End
Start
1
C
E
L
Course on Project Management
S
F
0
1
1
D
E
L
S
F
1
2
Activity
Description
A
Select satisfaction survey tool
B
Print survey tool
C
Select list of patients
D
Sample from list
E
Mail surveys to patients
F
Collect responses
G
Analyze data
Earliest and Latest Start and
Finish Times
E
S
F
0
2
E
L
S
F
2
5
E
L
F
5
7
L
2
A
S
3
B
E
S
F
7
11
2
E
11
L
L
E
S
F
4
G
1
3 End
E
L
S
F
0
1
1
D
E
S
F
1
2
L
Latest finish is the minimum of latest start of
succeeding tasks. Latest start is the latest finish
minus duration.
Course on Project Management
14
14
Start
C
F
Earliest and Latest Start and
Finish Times
E
S
F
0
2
E
L
S
F
2
5
E
L
F
5
7
L
2
A
S
3
B
E
S
F
7
11
L
E
2
F
4
S
F
E
11
14
L
11
14
G
3 End
Start
1
C
E
L
S
F
0
1
1
D
E
S
F
1
2
L
Latest finish is the minimum of latest start of
succeeding tasks. Latest start is the latest finish
minus duration.
Course on Project Management
Earliest and Latest Start and
Finish Times
E
S
F
0
2
E
L
S
F
2
5
E
L
F
5
7
L
2
A
S
3
B
E
2
S F
S
F
E
7 11
E
11
14
L
7 11
L
11
14
F
4
G
3 End
Start
1
C
E
L
Course on Project Management
S
F
0
1
1
D
E
L
S
F
1
2
Activity
Description
A
Select satisfaction survey tool
B
Print survey tool
C
Select list of patients
D
Sample from list
E
Mail surveys to patients
F
Collect responses
G
Analyze data
Earliest and Latest Start and
Finish Times
S F
S
F
S
F
S
F
S
F
E
0
2
E
2
5
E
5
7
E
7
11
E
11
14
L
0
2
L
2
5
L
5
7
L
7
11
L
11
14
2
A
3
B
E
2
F
4
G
3 End
Start
1
C
S F
Course on Project Management
1
D
S
F
E
0
1
E
1
2
L
3
4
L
4
5
Activity
Description
A
Select satisfaction survey tool
B
Print survey tool
C
Select list of patients
D
Sample from list
E
Mail surveys to patients
F
Collect responses
G
Analyze data
Slack Time
S
F
E
0
2
L
0
2
S
F
E
2
5
L
2
5
2
A
3
B
S
F
E
5
7
L
5
7
E
2
S
F
E
7
11
L
7
11
F
4
S
F
E
11
14
L
11
14
G
3 End
Start
1
C
S
F
E
0
1
L
3
4
1
D
S
F
E
1
2
L
4
5
Slack time = Latest start – Earliest start
Course on Project Management
Critical Path
S
F
E
0
2
L
0
2
S
F
E
2
5
L
2
5
2
A
3
B
S
F
E
5
7
L
5
7
E
2
S
F
E
7
11
L
7
11
F
4
S
F
E
11
14
L
11
14
G
3 End
Start
1
C
S
F
E
0
1
L
3
4
1
D
S
F
E
1
2
L
4
5
Critical path includes activities with no slack.
Course on Project Management
Communicating Project Schedule
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Course on Project Management
Time scaled network of activities
Gantt chart
Time an activity graphs and
completion graphs
Communicating Project Schedule



Course on Project Management
Time scaled network of activities
Gantt chart
Time an activity graphs and
completion graphs
Communicating Project Schedule
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
Course on Project Management
Time scaled network of activities
Gantt chart
Time an activity graphs and
completion graphs
Activity Splitting
Course on Project Management
A
B
E
C
D
Activity
Description
F
G
Precedents
A
Select satisfaction survey tool
B
Print survey tool
C
Obtain list of patients
D
Sample from list
E
Mail surveys to selected patients
F
Collect responses
E
G
Analyze data
F
A
C
D,B
Activity Splitting
Course on Project Management
A
B
E
C
D
Activity
Description
F
G
Precedents
A
Select satisfaction survey tool
B
Print survey tool
C
Obtain list of patients
D
Sample from list
E
Mail surveys to selected patients
F
Collect responses
E
G
Analyze data
F
A
C
D,B
Activity Splitting
Course on Project Management
A
B
E
C
D
Activity
Description
F1
G
F2
Precedents
A
Select satisfaction survey tool
B
Print survey tool
C
Obtain list of patients
D
Sample from list
E
Mail surveys to selected patients
F
Collect responses (F1=early, F2=Late)
E
G
Analyze data
F
A
C
D,B
Software
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Course on Project Management
Discovery of Critical Path
Crashing Schedules
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Cost time tradeoff
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Course on Project Management
Order of crashing
Take Home Lesson
The critical path includes activities
with no slack