What is Crashing?
Crashing is schedule compression by adding resources to critical path activities — more people, overtime, premium shipping. Scope stays the same; cost goes up. The professional version crashes the activities with the best time-bought-per-dollar first.
Exam tiebreaker: crashing raises cost; fast tracking raises risk. When the scenario says budget is available and quality can't be touched, crash. When there's no extra money, fast track.
Worked example
The critical path is 10 days too long. Adding a second crew to the two cheapest critical activities buys back 10 days for $18,000. Scope and quality unchanged; cost increased — that\'s crashing.