SOLVED

Section 7Â Â Variability in Activity Times 1) The PERT pessimistic time estimate is an estimate of the minimum time an activity will require. 2) The standard deviation of project duration is the average of the standard deviation of all activities on the critical path. 3) In PERT analysis, the identification of the critical path can be incorrect if a noncritical activity takes substantially more than its expected time. 4) The time an activity will take assuming very unfavorable conditions is: A) the optimistic time. B) the pessimistic time. C) the activity variance. D) the minimum time. E) exactly twice as long as the expected time. 5) The ________ distribution is used by PERT analysis to calculate expected activity times and variances. A) Normal B) Beta C) Alpha D) Gaussian E) Binomial 6) The expected activity time in PERT analysis is calculated as: A) the simple average of the optimistic, pessimistic, and most likely times. B) the weighted average of a, m, and b, with m weighted 4 times as heavily as a and b. C) the sum of the optimistic, pessimistic, and most likely times. D) the sum of the optimistic, pessimistic, and most likely times, divided by six. E) the sum of the activity variances, divided by six. 7) Which of the following statements regarding PERT times is true? A) The optimistic time estimate is an estimate of the minimum time an activity will require. B) The optimistic time estimate is an estimate of the maximum time an activity will require. C) The expected time estimate is calculated as t = (a + 4m + b). D) The pessimistic time estimate is an estimate of the minimum time an activity will require. E) The most likely time estimate is an estimate of the maximum time an activity will require. 8) Which of the following statements regarding PERT times is true? A) The expected time is an estimate of the time an activity will require if everything goes as planned. B) The optimistic time estimate is an estimate of the maximum time an activity will require. C) The expected time estimate is calculated as t = (a + 4m + b)/6. D) The pessimistic time estimate is an estimate of the minimum time an activity will require. E) The most likely time estimate is an estimate of the maximum time an activity will require. 9) The beta distribution is used in project management to: A) calculate slack on activities not on the critical path. B) calculate the probability that a project will be completed within its budget. C) calculate pessimistic and optimistic activity times. D) determine which activity should be crashed. E) none of the above 10) The beta distribution is used in project management to: A) determine which activity should be crashed. B) calculate the probability that a project will be completed within its budget. C) calculate expected activity times. D) calculate slack for activities on the critical path. E) none of the above