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

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

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Construction Planning and Management
Earliest finish of an activity is always

Greater than earliest event time of the following node
Greater than or equal to earliest event time of the following node
Less than earliest event time of the following node
Less than or equal to earliest event time of the following node

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

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

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