Essay Chapter 9

Submitted By Shane-Bellows
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Pages: 5

Chapter 9
Project Scheduling:
Networks, Duration
Estimation, and
Critical Path
09-01

Chapter 9 Learning Objectives
After completing this chapter, students will be able to:
Understand and apply key scheduling terminology. Apply the logic used to create activity networks, including predecessor and successor tasks.
Develop an activity network using Activityon-Node (AON) techniques.
Perform activity duration estimation based
09-02
Copyrighton
© 2013
Pearson
Education,
Publishing as Prentice Hall estimating the use ofInc.probabilistic Chapter 9 Learning Objectives
After completing this chapter, students will be able to:
Construct the critical path for a project schedule network using forward and backward passes.
Identify activity float and the manner in which it is determined.
Calculate the probability of a project finishing on time under PERT estimates.
Understand the steps that can be
Copyrightemployed
© 2013 Pearson Education,
Publishing as Prentice to Inc. reduce the Hall critical path. 09-03

Project Scheduling
Project scheduling requires us to follow some

carefully laid-out steps, in order, for the schedule to take shape.
Project planning, as it relates to the scheduling

process, has been defined by the PMBoK as:
The identification of the project objectives and the ordered activity necessary to complete the project including the identification of resource types and quantities required to carry out each activity or task.
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09-04

Project Scheduling Terms
Successors
Predecessors
Network diagram
Serial activities
Concurrent
activities

B
D

A

E

F

C
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09-05

Project Scheduling Terms
• Merge activities
• Burst activities
• Node
• Path
• Critical Path
B
D

A

E

F

C
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09-06

Network Diagrams

FIGURE 9.2 Alternative Activity Networks for Term Paper Assignment
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09-07

AOA Versus AON
The same mini-project is shown with activities on arc…
B

E

D

F
C

…and activities on node.
E

D
B

F
C

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09-08

Node Labels
Early Start

Activity Float

Late Start

ID Number

Early Finish

Activity Descriptor
Activity Duration

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Late Finish

09-9

Activity Node Labels Using MS Project 2010

FIGURE 9.4
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09-10

Serial Activities

Serial activities are those that flow from one to the next, in sequence.

FIGURE 9.5
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09-11

Activities Linked in Parallel (Concurrent)

en the nature of the work allows for more than one activity be accomplished at the same time, these activities are called ncurrent and parallel project paths are constructed through th work. FIGURE 9.6
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09-12

Merge Activity

FIGURE 9.7
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09-13

Burst Activity

FIGURE 9.8
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09-14

Complete Activity Network

FIGURE 9.10
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09-15

Developing the Activity Network Using MS
Project 2010

FIGURE 9.11
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09-16

Duration Estimation Methods
Past experience
Expert opinion
Mathematical derivation – Beta

distribution
Most likely (m)
Most pessimistic (b)Activity
Most optimistic (a)

 b  a
Variance = s  

6


2

a  4m  b
Activity Duration = TE 
6
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09-17

2

FIGURE 9.14 Symmetrical (Normal)…