1. What is Activity
• An activity or task is a given kind and
amount of work which:
– Consumes time
– Consumes Resources
– has a definable beginning and ending
Fixing False Sealing
3 men x 30 days
Start time 3000 board type End time
Spring 2008, Bar Chart 1
King Saud University Dr. Khalid Al-Gahtani

2. What is Project
• A project is a set of activities with
– A well-defined objective(s)
– A target completion date
– An estimated budget
Plan s & R equired
Specification s Product
Project
M an agem ent
L im ited Project
G iven R esources O bjectives D esired
Spring 2008, Bar Chart 2
King Saud University Dr. Khalid Al-Gahtani

3. Type of Schedule
• Written Schedule
• Gantt Chart (Bar Chart)
• CPM Schedules (Critical Path Method)
A
– Activity on Arrow 5
– Activity on Node AB A B
• PERT
30 X = 36 40
• LSM (Linear Schedule Method)
Spring 2008, Bar Chart 3
King Saud University Dr. Khalid Al-Gahtani

4. Bar Chart
• STEPS
– Analyze the project and specify the basic approach
to be used.
– Break the project down into a reasonable number of
activities to be scheduled.
– Estimate the time required to perform each activity.
– Place the activities in sequence of time, taking into
account the requirements that certain activities
must be performed sequentially.
• Logical constrain
• Resources constrain
– If a completion date is specified, the diagram is
adjusted until this constraint is satisfied.
Spring 2008, Bar Chart 4
King Saud University Dr. Khalid Al-Gahtani

5. Bar Chart
• Example:
Activity Activity Description Dependency Duration
ID
A Excavation 3
C Foundation A 3
D Column B, C 2
B Moving the soil out A 2
E Wall C, D 5
F Roof E, D 5
Spring 2008, Bar Chart 5
King Saud University Dr. Khalid Al-Gahtani

6. Solution
A
C
D
B
E
F
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18
Spring 2008, Bar Chart 6
King Saud University Dr. Khalid Al-Gahtani

7. Alternative Solution
A
B
C
D
E
F
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18
Spring 2008, Bar Chart 7
King Saud University Dr. Khalid Al-Gahtani

8. Bar Chart
• Advantages of Bar Chart
– Very Graphical
– Easy to understand
– Most widely used
• Disadvantages of Bar Chart
– Difficult to Update
– Difficult to find the Critical Path
– Difficult to setup and maintain a large project because
it is essentially a manual graphical procedure.
Spring 2008, Bar Chart 8
King Saud University Dr. Khalid Al-Gahtani

9. How to identify the Critical path
in a Bar Chart
• Types of a Project Activity
– Critical Activity: if it is delayed, it will delay the
project.
– Noncritical Activity: it may not delay the
project if it’s well managed.
Spring 2008, Bar Chart 9
King Saud University Dr. Khalid Al-Gahtani

10. STEPS to identify the Critical Path
• Start with the last Activity; Draw a vertical line
from the i Node of late Activity.
i j
• The activities whose j nodes touch the vertical
line, are Potential Critical Activity.
• Draw a vertical line from the i node of the new
critical activity.
• Proceed in this manner until you reach Day 0.
Spring 2008, Bar Chart 10
King Saud University Dr. Khalid Al-Gahtani

11. Identify the Critical Path
A
B
C
D
E
F
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18
Spring 2008, Bar Chart 11
King Saud University Dr. Khalid Al-Gahtani

12. Class Work
Activity Depends upon Duration (Weeks)
A C, J 3
B F 2
C F 3
D C, I 4
E G 5
F H 4
G H 2
H - 3
I E, F 4
J B 2
Spring 2008, Bar Chart 12
King Saud University Dr. Khalid Al-Gahtani

13. CW Solution
Act. W1 W2 W3 W4 W5 W6 W7 W8 W9 W10 W11 W12 W13 W14 W15 W16 W17 W18
H
F
G
E
I
B
C
J
A
D
Spring 2008, Bar Chart 13
King Saud University Dr. Khalid Al-Gahtani