Deterministic networks use three time estimates shortest, most likely and longest for each activity in order to best determine the activity's estimated time.. If the expected length
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3. Once a project is approved and underway, project managers are only responsible for effectively managing time and costs which, if done well, will assure project completion on time and on budget.
Trang 2True False
13. Although PERT and CPM were originally developed for somewhat different types of projects, they are now nearly identical in terms of analysis and procedures.
True False
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True False
27. If two consecutive activities have shared slack, this means that each of them can use only half of the slack without delaying completion of the project.
True False
28. Deterministic networks use three time estimates shortest, most likely and longest for each activity in order to best determine the activity's estimated time.
33. If the expected length of a path is more than 2.5 standard deviations less than a desired project completion time, the path would not be a factor in assessing the probability of finishing the project on time.
True False
34. In order to determine the probability of timely project completion, it is sometimes necessary to take into account paths other than the critical path.
True False
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35. The probability that the project will go beyond the desired time is equal to one minus the joint probability that all paths will be completed within the desired time.
Trang 9What is the earliest finish time for activity 1011 (far right hand side), if the earliest start time of 810 (upper left hand side) is 12, and the earliest start time of 910 (lower left hand side) is 13?
Trang 10What is the latest start time of activity 67 if the latest finish of activity 78 is 26, and the latest finish of activity79 is 23?
Trang 1165. Given this information about activity 34: ES = 10, EF = 15, LS = 16, and LF = 21, we can determine that the amount of slack associated with the activity is:
Trang 1582. In the project network presented below, numbers on each arrow refer to the expected time and standard deviation in weeks for that particular activity. For example, "8,2" indicates an activity with an expected time of
Trang 16(A) What is expected project duration time?
(B) Determine the probability that the project will take more than 35 weeks to complete. (All times are in weeks.)
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90. What is the probability that this project will take more than 10 weeks to complete if the activity means and standard deviations are as shown below:
Trang 314. Matrix organizations transfer control of workers to project managers for the duration of the project. FALSE
Trang 3413. Although PERT and CPM were originally developed for somewhat different types of projects, they are now nearly identical in terms of analysis and procedures.
Trang 3516. The sum of times of the longest path in a network indicates expected project completion time, and the activities represent the critical activities.
Trang 3619. The earliest finish time for an activity is equal to the latest finish time minus the activity time. FALSE
Trang 3928. Deterministic networks use three time estimates shortest, most likely and longest for each activity in order to best determine the activity's estimated time.
Trang 40activities on the critical path.
FALSE
The standard deviation of the critical path is equal to the square root of the sum of the variances of all of the activities on the critical path
The total cost of crashing any one activity should not exceed the value gained by shortening that activity's duration
Trang 4134. In order to determine the probability of timely project completion, it is sometimes necessary to take into account paths other than the critical path.
Trang 4340. The optimum project length in crashing occurs where the cumulative cost of crashing equals savings in the indirect costs.
Trang 4751. A popular tool for planning and scheduling simple projects, and for initial planning on more complex projects, is the:
Trang 50expected time of five and an ES time of six. Activity 67 has an expected time of seven and an ES time of seven. Activity 78 has an expected time of 10. The ES for activity 78 is:
Trang 51What is the latest start time of activity 67 if the latest finish of activity 78 is 26, and the latest finish of activity79 is 23?
Trang 5365. Given this information about activity 34: ES = 10, EF = 15, LS = 16, and LF = 21, we can determine that the amount of slack associated with the activity is:
Trang 5569. A PERT/CPM activity has an optimistic time estimate of three days, a most likely time estimate of eight days, and a pessimistic time estimate of 10 days. The expected time (in days) of this activity is:
Trang 5671. There are four activities on the critical path, and they have standard deviations of 1, 2, 4, and 2 days. The standard deviation of the critical path is:
Trang 5773. The project management strategy of injecting additional resources in order to reduce the length of the project is called:
Trang 6182. In the project network presented below, numbers on each arrow refer to the expected time and standard deviation in weeks for that particular activity. For example, "8,2" indicates an activity with an expected time of
Trang 63(A) What is expected project duration time?
(B) Determine the probability that the project will take more than 35 weeks to complete. (All times are in weeks.)
Trang 64There are two ways a second week can be crashed out of this project. Option 1 is to crash activity 45 by one week for a cost of 20. The other is to crash activity 34 (cost = 8) and 67 (cost = 12)
For the third oneweek reduction, activity 45 must be crashed, for a cost of 20
Feedback: After the first crashed activity, there are two ways a second week can be crashed activity 45 for a cost of 20 or activities 34 (cost = 8) and 67 (cost = 12). For the third oneweek reduction, activity 45 must be crashed, for a cost of 20
Trang 6690. What is the probability that this project will take more than 10 weeks to complete if the activity means and standard deviations are as shown below:
Trang 81be completed? 95%? 99%?
81.4; 83.25; 86.65
Feedback: Starting from a zscore set by the given probability, solve for the specified time (given the mean and standard deviation of the critical path)
Trang 83Feedback: After the first week's reduction, A is common to both critical paths so is most economical to crash. Acan only be crashed one week. H is common to both critical paths at this point, so it is most economical after A
Trang 85136. If an activity is determined to be on the critical, that means that it, and perhaps other, will affect project .