Explanation : Common Errors in Network: There are three types of errors which are common in Network Diagramming:
> Looping
> Dangling
> Redundancy
Looping (Cycling): In a network diagram looping error is also known as cycling error. Drawing an endless loop in a network is known as error of looping. A loop can be formed if an activity is represented as going back in time.
Figure: Looping Error
Dangling: In order to disconnect an activity before tbe completion of all the activities in a network diagram is called as Dangling. Redundancy: If a dummy activity is the only activity emanating from an event and which can be eliminated is called as Redundancy.