Construction Planning and Management
During the construction period, price variation clause in contracts caters to

Variation in cost in materials element, labour element and petrol-oil-lubricant element
Increase in rates of only important materials
Rate of inflation
Variation in total cost of the project on an ad hoc basis

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

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

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