Which of the following describes crashing a project schedule?

Performing activities concurrently, known as fast-tracking, is another schedule compression technique, distinct from crashing which specifically involves adding resources.

Crashing a project schedule is a technique used to shorten the project duration for the least incremental cost by adding resources, increasing overtime, or bringing in more personnel to accelerate critical path activities. This method directly addresses the need to complete the project earlier by intensifying work efforts.

While crashing often reduces float, removing all float is not the definition of crashing; it is a consequence of trying to shorten the schedule significantly.

Reviewing scope to remove unnecessary requirements is scope reduction or optimization, not a schedule compression technique like crashing.