Construction Planning and Management
In time-cost optimization of a project, crashing is done.

Only on activities lying on the original critical path and having flatter cost slopes
On all the activities
On all the activities lying on the critical path
On original critical activities and those that become critical at any stage of crashing in the order of ascending cost slope

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Construction Planning and Management
At a work site, statistical quality control of concrete means

Measurement of risks to eliminate failures
Reduction in costs for the removal of defects
Applying the theory' of probability to sample testing or inspection
Reduction in wastage of inspection costs

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