Question

question 3.12

Chapter 3 Project Management 91 Table for 3.8 Time Activity Immediate Code Description in hours) Predecesur Planning Find location determine resource requirements Purchasing Requisition of lumber and sand Excavation Planning Dig and grade Sawing Planning Saw lumber inte appropriate sizes Placement Purchasing Position lumber in comect locations Sawing. c om Assembly Nail lamber together Placement Tafill Put sand in and under the equipment Ambly Outfill Put dirt a nd the equipment Assembly Decoration Put grass all over the garden, landscape, paint Infillut Problem 3.7 continued a) Draw the project network using AON a) Draw the appropriate AON PERT diagram for Ed Duplega's management team. b) Identify the critical path b) Find the critical path. c) What is the expected project length? Draw a Gantt chart for the project. PX c) What is the project completion time? 3.8 The City Commission of Nashville has decided to . 3.13 A small reaction of a Hard Rock Cafe if she has huia hocal garden and picnic area in the heart of the city for six activities in hows. For the following estimates of adh, the recreation of its citizens. The precedence table for all the activi. calculate the expected time and the standard deviation for each activity: ties required to construct this area successfully is given on the top of this page. Draw the Gantt chart for the whole construction activity 3.9 Refer to the table in Problem 3.8 Activity a) Draw the AON network for the construction activity b Draw the AOA network for the construction activity . 3.10 The activities needed to build an experimental chemical contaminant tracking machine at Charlie Cook Corp. are listed in the following table. Construct an AON network for these activities Immediate Immediate Activity Predecessors) Activity Predecessors) .. 3.14 McGee Carpet and Trim installs carpet inc ercial offices. Anda McGee has been very concerned with the amount of СЕ time it took to complete several recent jobs. Some of her workers are very unreliable. A list of activities and their optimiste cople tion time, the most likely completion time, and the pessimistico • 3.11 Charlie Cook (sre Problem 3.10) was able to deter- plotion time all in days) for a new contract are given in the mine the activity times for constructing his chemical contaminant following table tracking machine. Cook would like to determine ES, EF, LS, LE, and slack for cach activity. The total project completion time and the crit- Time(d ) Ical path should also be determined. Here are the activity times: Time Activity Predecessors) 'Time Activity (weeks) Activity (weeks) • 3.12 The activities described by the following table are given for the Duplapa Corporation Immediate Activity Predecessors) Time a) Determine the expected completion time and variance for each activity b) Determine the soal project completion time and the critical path for the project c) Determine ES, EF, LS, L andsack for each activity d) What is the probability that McGee Carpet and Trim will finish the project in 10 days or less? Pac EF G H

Answer 1

Solution:

To solve the problem 3.12, it is first needed to draw the AON PERT diagram with the help of the activities. The possible paths can be calculated from the AON PERT diagram. From the diagram, three possible paths can be drawn. The critical path can be calculated based on the values. The path with the greatest value can be taken as the critical path.

The AON PERT diagam D6 H 5 B7 E9 A9 G 6 F4 Critical path pombls patks The are A-B-D H-1 30 =9+7 + 6 +5+ 3 A-B-E-G-2 341 Sitical Path 97 49+6+3 " A-CIF-G-T 25 = 9 +3 t4 + +3 areateat A-B-E -G-1has the ana, ao twoeld be conadred ap the Rriticar patth

The project completion time is calculated based on the time of the critical path which is 34.

Troject onpletion time Prafect opletio tme of aagemetit The team no A B E - G 1 34

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Answer 2

 Draw the Gantt chart for the whole construction activity 3.9 Refer to the table in Problem 3.8 Activity a) Draw the AON network for the construction activity b Draw the AOA network for the construction activity .