Construction Planning and Management
Preliminary project report for a road project must contain

The soil survey, traffic survey, concept design and approximate cost
The detailed estimated cost based on detailed design
The several alternatives of the project that have been considered
The contract documents for inviting tenders

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

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

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