Industrial Engineering and Production Management
Which of the following are the guidelines for the construction of a network diagram?

Each activity is represented by one and only one arrow in the network
Dangling must be avoided in a network diagram
All of the these
Dummy activity consumes no time or resource

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Industrial Engineering and Production Management
Pick up the incorrect statement about advantages of work sampling

Calculations are easier, method is economical and less time consuming
Simultaneous study of many operators may be made by a single observer
Permits a fine breakdown of activities and delays
No time measuring devices are generally needed

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