Construction Planning and Management
Total float for any activity is defined as the difference between

Its latest finish time and earliest start time for its successor activity
Its latest start time and earliest start time
Its earliest finish time and earliest start time for its successor activity
Its latest start time and earliest finish time

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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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