Question

1. Waiting lines occur even in systems that are less that 100% utilized because of variability in service rates and/or arrival rates - TRUE OR FALSE
2. In a single-server system, the utilization factor is equal to the mean arrival rate divided by the mean service rate - TRUE OR FALSE
3. All preceding activities have to be completed before work can start on a follower activity - TRUE OR FALSE
4. To reduce project duration, activities on the critical path will have to be crashed - TRUE OR FALSE
5. The project duration is equal to the sum of the durations of all activities in a network - TRUE OR FALSE
6. The longest path in a network is called the critical path. Is it possible to have more than one critical path in a network? - YES OR NO
7. In a probabilistic network if you know the estimated time (also known as mean or average time), you can calculate its standard deviation - TRUE OR FALSE

Answer 1

1) False

As the customers arrive at a variable rate, which averages six per hour. Since there is excess capacity, no waiting lines will form.

2) True

3) True

4) False

5) True

6) Yes, true

7) True