The difference between the LST and EST is called free slack.

Question

Quizplus · Accepted Answer

The difference between the Latest Start Time (LST) and Earliest Start Time (EST) is not called free slack; it is often referred to as total float or slack time, which measures the flexibility in scheduling a task without delaying the project. Free slack, on the other hand, is the amount of time a task can be delayed without delaying the early start date of any subsequent tasks.

The Difference Between the LST and EST Is Called Free