ActivityImmediateOptimisticMost LikelyPessimisticPredecessorA789B101013A81013111417E7811F789GF459B667H7910ENDE.G.ID. . Determine the expected completion time and variance for each activity.

Solution The expected completion time is given by - E=O+4M+P6 where O is optimistic time, M is most…

Answered: Activity Immediate Optimistic Most…

Practical Management Science

6th Edition

ISBN:9781337406659

Author:WINSTON, Wayne L.

Publisher:WINSTON, Wayne L.

Chapter2: Introduction To Spreadsheet Modeling

Section: Chapter Questions

Problem 20P: Julie James is opening a lemonade stand. She believes the fixed cost per week of running the stand...

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The following estimates of activity times (in days) are available for a small project: Activity Optimistic Most Probable Pessimistic A 4 5.0 6 B 8 9.0 10 C 7 7.5 11 D 7 9.0 10 E 6 7.0 9 F 5 6.0 7 Compute the expected activity completion times and the variance for each activity. An analyst determined that the critical path consists of activities B-D-F. Compute the expected project completion time and the variance of this path.
2. The time estimates (in weeks) for the activities of a PERT network are given below. (i) (ii) 1-2 1-3 1-4 2-5 3-5 4-6 5-6 18 9 10 8 16 7 Activity to 24 16 3 tm 7 9 20 14 2 tp 9 20 11 11 28 18 4 Draw the project network and calculate the project length. Calculate the standard deviation and variance along the critical path. (iii) Find the probability of completing the project one day earlier and 2 days later.
In zuman Inc. The expected activity time is 7 weeks, whereas the optimistic time is 12 weeks and most likely time is 15 weeks , for an pert activity. Ascertain the pessimistic time and the variance of the activity.
You have signed a contract to build a garage for the Simpsons. You will receive a $500 bonus for completing the project within 30 working days. The contract also contains a penalty clause in which you will lose $100 for each day the project takes longer than 30 working days. Given the information below, complete the forward and backward pass, compute activity slack, and identify the critical activities. ID A B C D E F G H I 3 K Description: Prepare site Pour foundation Erect frame Roof Windows Doors Electrical Rough-in frame Door opener Paint Cleanup The project will take The critical activities are The early start on Activity Dis The late start on Activity E is The slack on Activity E is The slack on Activity F is Predecessor None A 8 C C C D, E, F, G F, G H, I 3 Time (days) ANANH0HUMMe 4 2 4 days. days. days days days
Given the following network and probabilistic activity timeestimates, determine the expected time and variance foreach activity and indicate the critical path:
Charlie Cook was able to determine the activity times for constructing his chemical contaminant tracking machine. Cook would like to determine ES, EF, LS, LF, and slack for each activity. The total project completion time and the critical path should also be determined. Here are the activity times: Q Activity Time (weeks) Immediate Predecessor(s) Activity Time (weeks) Immediate Predecessor(s) A B C D 7 8 2 1 Charlie's earliest start (ES) and earliest finish (EF) are: A A Activity A EFGH ES EF 7 5 7 11 8 B B C, E D, F
To complete the wing assembly for an experimental aircraft, Jim Gilbert has laid out the seven major activities involved. These activities have been labeled A through G in the following table, which also shows their estimated completion times (in weeks) and immediate predecessors. Determine the expected time and variance for each activity.
Kelle Carpet and Trim installs carpet in commercial offices. Peter Kelle has been very concerned with the amount of time it took to complete several recent jobs. Some of his workers are very unreliable. A list of activities and their optimistic completion time, the most likely completion time, and the pessimistic completion time (all in days) for a new contract are given in the following table: Time (days) Activity a 3 5 3 4 1 2 7 TH 3 10 10 ABCD E F G H I K 61 525DE5 13 m Activity A 3 7 11 15 9 This exercise contains only part a. a) Based on the activity time estimates, the expected times and variance for each of the activities are: (Round your responses to two decimal places.) b 9 5 3 8 5 13 49127 13 Immediate Predecessor(s) Expected Time C B, D A, E A, E F G C H, I Variance
2. Complete Network Table Activity Predecessor Normal time Normal cost Crash time Crash cost Max Crash Time Slope A - 12 $200 9 $350 B A 8 $300 8 $300 C A 9 $250 7 $450 D B 6 $400 5 $600 E B,C 5 $150 4 $225 F C 10 $500 9 $650 G D,E,F 8 $400 6 $900 Determine Normal Project Cost:
i. a) XYZ Ltd has listed the following activities in respect of a project. Activity Preceding Activity A B C D E F G H I J K A A A B C C C and D E and F G and H I and J Draw a network diagram and determine the critical path Duration (days) 2 3 5 8 6 1 2 3 7 4 5 Page 1 of 2
Problem #2 Develop a network for the problem (below). Determine the total project completion time and the critical path(s). Activity Immediate Predecessors Time (Days) A - 3 B - 7 C A 4 D B 2 E C, D 5 F A 6 G E, F 3
Dave Fletcher was able to determine the activity times for constructing his laser scanning machine. Fletcher would like to determine ES, EF, LS, LF, and slack for each activity. The total project completion time and the critical path should also be determined. Here are the activity times: Time Activity (weeks) 6 7 ABCO 3 2 Immediate Predecessor(s) A A D Dave's earliest start (ES) and earliest finish (EF) are: Time Activity (weeks) 4 EFGHI 6 10 7 Immediate Predecessor(s) B B C, E D,F

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Activity Immediate Optimistic Most Likely Pessimistic Predecessor A 7 8 9 B 10 10 13 A 8 10 13 11 14 17 E 7 8 11 F 7 8 9 G F 4 5 9 B 6 6 7 H 7 9 10 END E.G.I D. . Determine the expected completion time and variance for each activity.