In the time-cost optimization using CPM, the crashing of the activities along the critical path is done starting with the activity having

Higher standard deviations mean

The optimistic time estimate represents

The time corresponding to the minimum total project cost is

Crashing to the project means

Interfering float is the difference between

For a given size of bucket, the ideal output of a dragline will be least in

Slack is given as the difference between

Economic saving of time results by crashing