The correct answer is: A. its earliest finish time and earliest start time for its successor activity.
Free float is the amount of time that an activity can be delayed without delaying the start of any successor activities. It is calculated as the difference between the earliest finish time of the activity and the earliest start time of its successor activity.
The earliest finish time of an activity is the earliest time that the activity can be completed, given the start and finish times of all preceding activities. The earliest start time of an activity is the earliest time that the activity can start, given the start and finish times of all preceding activities and the constraints on the activity.
The earliest finish time of an activity is equal to the latest start time of the activity plus the duration of the activity. The latest start time of an activity is equal to the earliest finish time of the activity minus the free float of the activity.
Free float is a valuable tool for scheduling projects. It can be used to identify activities that have the most flexibility in terms of scheduling, and to determine how much time can be allowed for delays without impacting the overall project schedule.
Here is a brief explanation of each option:
- Option A: its earliest finish time and earliest start time for its successor activity. This is the correct answer. Free float is the amount of time that an activity can be delayed without delaying the start of any successor activities. It is calculated as the difference between the earliest finish time of the activity and the earliest start time of its successor activity.
- Option B: its latest start time and earliest start time. This is not the correct answer. The latest start time of an activity is equal to the earliest finish time of the activity minus the free float of the activity.
- Option C: its latest finish time and earliest start time for its successor activity. This is not the correct answer. The latest finish time of an activity is equal to the earliest finish time of the activity plus the duration of the activity.
- Option D: its earliest finish time and latest start time. This is not the correct answer. The earliest finish time of an activity is equal to the latest start time of the activity plus the duration of the activity.