Exam 9: Project Scheduling: Networks,Duration Estimation,and Critical Path

-Activities C,D,and E in the project represented by the network are to be hammocked.What are the late start and early finish times of the hammock activity?

Project Test Bank is composed of activities we will refer to as A,B,C,and D for convenience (and lack of creativity).Durations and precedence requirements are shown in the table.Each of these activities can be conveniently laddered into two sub-activities of equal duration,so activity C in the original project becomes two activities,C1 and C2,each of which lasts 7 days.The first half of each activity serves as the predecessor to its second half and the first half of the original following activity.What is the difference in the late start time for activity C in the original project and activity C1 in the laddered project? Activity Length Predecessor A 10 - B 18 A C 14 A D 20 B,C

-Activities C,D,and E in the project represented by the network are to be hammocked.What are the early start and late finish times of the hammock activity?

Use the values in the table to calculate activity durations and variances for the project.Which path is critical? How closely should the other path be watched and why? Activity Predecessor Optimistic Likely Pessimistic A - 5 7 10 B A 4 6 9 C A 10 13 18 D B 8 11 15 E C, D 2 3 5

What is the slack time for activity E? Early Early Late Late \cline 5-7 Task Predecessor Duration Start Finish Start Finish - 8 14 23 8 , 6 23 26 32 , 32 38

Activity float is the difference between the late finish and early finish for the activity in question.

What is the underlying theory to the three time estimates approach? What data distribution should be applied in this case and what confidence should a project manager place in the calculations associated with this technique?

What is the slack time for Activity D given the activity times and precedence requirements shown in the table? Activity Time Predecessor A 5 - B 7 - C 8 A D 7 A E 4 B F 8 C, D G 9 E, F 7 G

At a merge point in a forward pass,the largest preceding early finish becomes the early start for that node.

A sequence of activities defined by the project network logic is a(n):

Use the information in the table to sketch the network and compute early and late start times. Activity Time Predecessor 8 4 5 , 12 8 4 9 , 12 6 , 5 9 12 ,

What is laddering and what advantages can be gained from its use in project management?

There's an old saying,"The job is not finished until the paperwork is done." From an activity network standpoint,this does not necessarily mean that the paperwork can't begin until the last non-paperwork activity is completed.It might be possible to work on some paperwork as early activities are completed.In order to depict this in an activity network:

The amount of time an activity may be delayed from its early start without delaying the finish of the project is the:

Activity Z has estimates a = 5,b = 12,m = 7; activity X has estimates a = 5,b = 11,m = 6; and activity Y has estimates a = 3,b = 11,m = 8.Which of the following statements is BEST?

-Use the network diagram and activity lengths in the nodes to determine the slack time for activity D.

Draw a network of any size that has at least one of each of the following features: merge activity,burst activity,hammock activity,ladder activity,critical path,serial activities,concurrent activities,and float.Mark these features on your network.

In assigning a value for the most pessimistic (b)duration,the project manager should estimate the duration of the activity to have a 99% likelihood that it will take b or less amount of time.

Consider a project composed of activities X and Y having equal length and performed in that order.Both activities can be laddered such that the first half of each activity is the predecessor for its own second half,so X1 precedes X2 and Y1 precedes Y2.The first half of X1 is also the predecessor for Y1.If the laddering procedure were performed again activities X and Y would be divided in four parts each,with precedence working as it did in the first split.Derive an expression for the minimum length of the project as laddering increases.

Use the values in the table to calculate activity durations and variances for the project.Which path is critical? How closely should the other path be watched and why? Activity Predecessor Optimistic Likely Pessimistic A - 4 6 10 B A 2 5 8 D A 6 7 9 E B 3 9 20 F C 7 9 11