Construction Planning and Management
Free float is mainly used to

Identify the activities, which can be delayed without affecting the total float of succeeding activity
Identify the activities which can be delayed without affecting the total float of preceding activity
Establish priorities
Identify the activities which can be delayed without affecting the total float of either the preceding or succeeding activities

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Construction Planning and Management
Batching refers to

Adjusting the water to be added in each batch according to the moisture content of the materials being mixed in the batch
Controlling the total quantity at each batch
Controlling the quantity of each material into each batch
Weighing accurately, the quantity of each material for a job before mixing

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