CST CPM & PERT Schedule Development 3

Question 1

When converting an Arrow Diagramming Method (ADM) network to a Precedence Diagramming Method (PDM) network, dummy activities are:

Accepted Answer

Eliminated because PDM uses node-based logic to capture dependencies directly

Answer

PDM places activities on nodes and uses dependency arrows with relationship types, making ADM's dummy activities unnecessary.

Question 2

A project manager wants to compress the schedule by overlapping phases. Which CPM technique involves starting a successor activity before its predecessor is fully complete?

Accepted Answer

Fast-tracking

Answer

Fast-tracking overlaps activities that would normally be done sequentially, introducing parallel work and potential rework risk.

Question 3

In PERT, if the optimistic estimate is 6 days, pessimistic is 18 days, and most likely is 9 days, what is the PERT expected duration?

Accepted Answer

10 days

Answer

PERT expected duration = (6 + 4×9 + 18) / 6 = (6 + 36 + 18) / 6 = 60 / 6 = 10 days.

Question 4

Which statement about the Critical Path Method is TRUE regarding resource constraints?

Accepted Answer

CPM assumes unlimited resources and does not factor resource constraints into float calculations

Answer

Traditional CPM is a pure logic-based technique that assumes resources are always available; resource constraints are handled separately through leveling.

Question 5

A 'near-critical path' in a CPM network is significant because:

Accepted Answer

It may become critical if activities on it experience delays, creating schedule risk

Answer

Near-critical paths with small total float are vulnerable to becoming critical if minor delays occur, representing a key schedule risk.

(CST) Certified Scheduling Technician Practice Test

(CST) Certified Scheduling Technician Practice Test

CST CPM & PERT Schedule Development 3