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

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

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Industrial Engineering and Production Management
The reasons which are basically responsible for the formation of a queue should be that

All of these
Output rate is linearly proportional to input
Output rate is constant and the input varies in a random manner
The average service rate Hess than the average arrival rate

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