The activity slack or float associated with any node on a PERT/CPM chart is shown by__________________?
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Answer: D. anyone of the above
Explanation
Activity float or slack can be calculated using various combinations of latest and earliest start/finish times. Total float represents the amount of time an activity can be delayed without delaying the overall project completion date. Subtracting early start times from late start times yields identical float values across all nodes in a network diagram. Network scheduling techniques use forward and backward passes through PERT/CPM charts to calculate event times. Earliest times indicate the earliest possible moment an event can occur, while latest times show deadlines without project delay. Slack or float provides project managers with scheduling flexibility to reallocate resources from non-critical to critical tasks.
Option A is incorrect because subtracting activity duration is part of specific float formulas rather than the sole method. Option B is wrong because considering only start time differences is just one valid mathematical variation of float calculation. Option C is incorrect because finish time differences alone represent another valid mathematical approach among several alternatives.
- Subject
- Engineering
- Category
- Mechanical Engineering
- Topic
- —
- Difficulty
- medium
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