An event represents the accomplishment of task. In a network diagram, beginning and ending of an activity are represented as events.
Step1: Number the start or initial event as 1.
Step2: From event 1, strike off all outgoing activities. This would have made one or more events as initial events (event which do not have incoming activities).
Number that event as 2.
Step3: Repeat step 2 for event 2, event 3 and till the end event. The end event must have the highest number.
Example : Draw a network for a house construction project. The sequence of activities with their predecessors is given in the following table, below.
Sequence of Activities for House Construction Project
Network diagram representing house construction project.
The network diagram in the above figure shows the procedure relationship between the activities. Activity A (preparation of house plan), has a start event 1 as well as an ending event 2. Activity B (Construction of house) begins at event 2 and ends at event 3.
The activity B cannot start until activity A has been completed. Activities C and D cannot begin until activity B has been completed, but they can be performed simultaneously. Similarly, activities E and F can start only after completion of activities C and D respectively. Both activities E and F finish at the end of event 6.
Example : Consider the project given in the following table and construct a network diagram.
Sequence of Activities for Building Construction Project
Solution: The activities C and D have a common predecessor A. The network representation shown in Figure Network representing the Error violates the rule that no two activities canbegin and end at the same events. It appears as if activity B is a predecessor of activity C, which is not the case. To construct the network in a logical order, it is necessary to introduce a dummy activity as shown in Figure.
Network representing the Error
Correct representation of Network using Dummy Activity
Example : Construct a network for a project whose activities and their predecessor relationship are given in Table.
Activity Sequence for a Project
Solution: The network diagram for the given problem is shown in Figure with activities A, B and C starting simultaneously.
Example : Draw a network diagram for a project given in Table.
Project Activity Sequence
Solution: An activity network diagram describing the project is shown in figure below:
Quantitative Techniques for management Related Tutorials
|Business Analyst Tutorial||Project Management Tutorial|
|Business Environment Tutorial||Marketing Research Tutorial|
|Business Management for Financial Advisers Tutorial||Research Methodology Tutorial|
|Business Ethics Tutorial||International Business Management Tutorial|
Quantitative Techniques for management Related Interview Questions
|Business Analyst Interview Questions||Project Management Interview Questions|
|Business Environment Interview Questions||Marketing Research Interview Questions|
|Business Management for Financial Advisers Interview Questions||Research Methodology Interview Questions|
|Business Ethics Interview Questions||Business Management Interview Questions|
|International Business Management Interview Questions|
Quantitative Techniques for management Related Practice Tests
|Business Analyst Practice Tests||Project Management Practice Tests|
|Business Environment Practice Tests||Marketing Research Practice Tests|
|Business Management for Financial Advisers Practice Tests||Research Methodology Practice Tests|
|Business Ethics Practice Tests||Business Management Practice Tests|
Quantitative Techniques For Management Tutorial
Quantitative Techniques – Introduction
Measures Of Central Tendency
Linear Programming: Graphical Method
Linear Programming: Simplex Method
Waiting Model (queuing Theory)
Theoretical Probability Distributions
Probability Distribution Of A Random Variable
All rights reserved © 2018 Wisdom IT Services India Pvt. Ltd
Wisdomjobs.com is one of the best job search sites in India.