Lag time is positive time that requires the successor activity to wait for a defined amount of time, such as three days, before it can begin. Lag time does not change the task relationship, but requires a "waiting time" before the starting of the activity can begin. A lag time is a delay between the predecessor and the successor tasks. Sometimes it may be needed to schedule a delay between the predecessor and the successor tasks. For example, if two coats of paint are required to paint a car, then the final coat should be applied only when the first coat dries. This delay is known as the lag time. The lag time is entered as a positive value. The lag time can be entered as a duration or as a percentage of the predecessor's task duration. It is entered on the Predecessor tab in the Task Information dialog box.
Answer option D is incorrect. Float is a natural event that is discovered through the forward pass when using the critical path method. Float cannot be arbitrarily added as lag.
Answer option C is incorrect. Lead time actually brings activities closer together and causes them, in some cases, to overlap.
Answer option B is incorrect. Management reserve is a pool of time allotted for unscheduled changes and events that affect the project duration.
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