Industrial Engineering and Production Management
A big advantage of PERT over Gantt charts is that in the former case

Interrelationship among activities is clearly shown
Activities and events are clearly shown
Activity times are clear
Early start and late finish of an activity are clearly marked

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Industrial Engineering and Production Management
Critical Path Net Work helps an engineer

To divert the resources from noncritical advanced activities to critical activities
All of these
To be cautious for avoiding any delay in the critical activities to avoid delay of the whole project
To concentrate his attention on critical activities

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