PERT/CPM NETWORK COMPONENTS - Quantitative Techniques for management

Network analysis in Quantitative techniques

Network analysis includes a variety of techniques which managers, specialists, accountants .

PERT / CPM networks contain two major components

  1. Activities, and
  2. Events

Activity: An activity represents an action and consumption of resources (time, money, energy) required to complete a portion of a project. Activity is represented by an arrow.

An Activity

An Activity

Event: An event (or node) will always occur at the beginning and end of an activity. The event has no resources and is represented by a circle. The ith event and jth event are the tail event and head event respectively.

An Event

An Event

Merge and Burst Events

One or more activities can start and end simultaneously at an event.

Merge and Burst Events

Preceding and Succeeding Activities

Activities performed before given events are known as preceding activities, and activities performed after a given event are known as succeeding activities.

Preceding and Succeeding Activities

Preceding and Succeeding Activities

Activities A and B precede activities C and D respectively.

Dummy Activity

An imaginary activity which does not consume any resource and time is called a dummy activity. Dummy activities are simply used to represent a connection between events in order to maintain a logic in the network. It is represented by a dotted line in a network, see Figure.

Dummy Activity

Dummy Activity


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