In the time-cost optimization, using CPM method for network analysis, the crashing of the activities along the critical path is done starting with the activity having
- ALongest duration
- BShortest duration
- CHighest cost slope
- DLeast cost slopeCorrect
Solution
Concept
Crashing rule
Formula
Cost slope = (crash cost − normal cost)/(normal time − crash time)
Step-by-step solution
1. Crash the critical activity that shortens the project at the least extra cost. 2. That is the activity with the least cost slope.
Explanation
Least cost per day saved.
Why the other options are wrong
Highest slope would be the most expensive.
Shortcut
Crash the cheapest first.
Correct answer: D) Least cost slope