Question

1. The following time estimates are given for an activity: optimistic time = 16 days, most likely time = 24 days and pessimistic time = 38 days. What is the expected time to complete this activity? Group of answer choices A. 16 B. 24 C. 38 D. 25 E. None of these answers are correct

2. The project duration is equal to the sum of the durations of all activities in a network.

Group of answer choices

True

False

3.The longest path in a network is called the critical path. Is it possible to have more than one critical path in a network?

Group of answer choices

A. Yes

B. No

4.A loading dock with two servers who work together as a team would be an example of a multiple-server system.

Group of answer choices

True

False

5.Queueing models enable finding an appropriate balance between the cost of service and the amount of waiting.

Group of answer choices

True

False

Answer 1

1. CORRECT ANSWER - D 25
It is given that- optimistic time = 16 days, most likely time = 24 days and pessimistic time = 38 days.
Formula for PERT Estimate is-
Pert Estimate = (Optimistic time + (4 X Most Likely time) + Pessimistic time)/6
Pert Estimate= ( 16 +( 4 X 24) + 38) / 6
Pert Estimate= (16+ 96+38)/6
Pert Estimate= 150/6 = 25

So rest of the options are incorrect.

2. FALSE
The project duration is equal to the sum of the duration of all activities in a network.duration with greatest total duration.

3. YES
Whenever there is multiple dependencies between tasks, or separate sequences that run for the same duration , it is possible to have more than one critical path so that paths can run concurrently.

4. FALSE
When two or more servers work together as a team it is a single channel system.

5. TRUE
Queuing models calculates the total time required by a customer to wait and the cost incurred in order to serve the customer and tries to reduce both by find a balance between them.