du pont de Nemours Company (USA) in 1958 and named as critical path method (CPM) to schedule and control the project. Critical Path Method (CPM):ĬPM method developed by E.I. Programme Evaluation and Review Technique (PERT). The most commonly used network techniques are:Ģ. The events can be further classified into following three categories:Īn event which represents the joint completion of more than one activity is known as merge event.Īn event which represents the beginning of more than one activity is known as burst event.Īn event may be merged for some activities and burst for some other activities simultaneously.Įssay # 3. Therefore, the major difference between activities and events is that activities represent the passage of time whereas events are points in time.Īll activity arrows must begin and end with event nodes as shown below: It is represented by a circle and the event number is written within the circle. Event consumes neither time nor resources.

(b) When two or more activities have some (but not all) of their immediate predecessor activities in common.Ī dummy activity is generally shown by a dotted line in network diagrams:Īn event in a network diagram is a specific instant of time which marks the start, or the end of an activity.

(a) When two or more parallel activities in a project have same starting and finishing points. Activities which can be accomplished concurrently are known as concurrent activities.Īn activity which does not consume any kind of resource and/ or time is known as dummy activity.Ī dummy activity is added in a network only to establish the given precedence relationship among other activities of project in following two situations:

Schedule network analysis definition