head event tail event dual role event none of the above

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does not require any resources or any time has no bearing on the network has only head event but no tail event has no tail event but only a head event

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Gamma distribution Log-normal distribution Normal distribution Beta distribution

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latest start time and the earliest start time latest finish time and the earliest finish time time available and the time required to complete the activity all the above

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a parabola ∩-shaped curve. a straight line ∪-shaped curve

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Excavate the foundations Await the arrival of concrete material Cure the foundation concrete Lay the foundation concrete

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Excavate trench Assemble parts Mix concrete Design completed

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adjustment of resources to have the least variations gradual increase in resources complete revamping of resources to suit the requirement optimization and economical utilization of resources

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ahead of schedule condition on schedule condition behind the schedule condition none of the above

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the shortest time required to complete the activity under favourable conditions the maximum time required to complete the activity under adverse conditions the time the activity would most often require if normal conditions prevail none of the above

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