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

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
Only on activities lying on the original critical path and having flatter cost slopes

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

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

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