AIC Construction Project Planning 2

Question 1

In a CPM network, an activity has ES=10, EF=15, LS=14, and LF=19. What is its total float?

Accepted Answer

4 days

Answer

Total float equals LS minus ES (or LF minus EF), which is 14 - 10 = 4 days.

Question 2

Free float for an activity is best defined as the time it can be delayed without delaying:

Accepted Answer

The early start of any immediate successor

Answer

Free float is the delay an activity can absorb without pushing back the early start of any succeeding activity.

Question 3

Which precedence diagramming relationship is most commonly used to model overlapping work such as starting drywall a few days after framing begins?

Accepted Answer

Start-to-Start with a lag

Answer

A Start-to-Start relationship with lag lets a successor begin a set time after the predecessor starts, modeling overlap.

Question 4

A scheduler shortens the project by adding a second crew to critical activities at extra cost. This technique is called:

Accepted Answer

Crashing

Answer

Crashing compresses the schedule by adding resources to critical activities, typically increasing direct cost.

Question 5

When crashing a schedule, which activity should normally be shortened first?

Accepted Answer

The critical activity with the lowest cost slope

Answer

The most economical approach crashes the critical activity with the lowest cost per day saved first.

AIC - American Institute of Constructors Certification Practice Test