PM.64 The US government has contracted with Raytheon to build its new Peacekeeper 2 ballistic missile. The project has been laid out with durations (inweeks), predecessors, and costs included:ActivityNormal Time (weeks)Crashed Time (weeks)Normal CostCrashed CostPredecessor(s)A4$2,100$3,350В1210$6,150$7,000AC86$3,800$4,350ВWhich activity is the least desirable crashing candidate?O AВIn order to reduce the project's overall duration by one week, at the lowest cost possible, which activity should you crash?ВA How much would it cost to crash the project by one week?NumberHow much would it cost to crash the project by three weeks?NumberHow much would it cost to crash the project by five weeks?Number

From the given information - Desirable crashing candidate = Crashed cost - Normal cost For…

Answered: PM.64 The US government has contracted…

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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7
1) A list of activities, precedence relations, and optimistic, most likely, and pessimistic activity completion times for a project are as given below. Activity Name Predessor Activities Optimistic Most Likely Pessimistic A - 4 5 6 B A 3 4 8 C B 1 2 3 D A,C 3 6 8 E D 7 8 9 F E 4 5 7 G C 3 4 5 H D,E,G,I 12 13 15 I C 1 2 4 J G,H 1 1 1 K F,H,J 1 6 7 a) Draw an AOA network diagram for this project b) What is the expected competion time for each activity in the project? c) What is the variance associated with the expected completion time of each activity in the project? d) What is the critical path for the project? e) What is the expected completion time of the project? f) What is the variance of the expected completion time of the project? g) What is the probability that the project will be completed in 48 days, 45 days, and 42 days? 2) Using the data in problem 1), answer the following questions; use the most likely time as an estimate of the activity times in these questions. a) Draw an…
A project has activities, durations, costs, and precedence relationships as shown in the following table. Accelerated Duration (Weeks) Immediate Predecessor Path A-C-E A-D-H-I B-F-H-I Activity B-G-I A B с D E F GJ H I Present Duration (Weeks) Project is reduced from Activity Crashed (1 week) Additional Cost for Crashing 8 13 8 18 13 15 10 7 5 $ to B B 7 I 11 4 16 8 13 8 6 4 $14,000 Develop a time-cost trade-off analysis. Detail the steps that you would use to accelerate or crash the project to its minimum duration at the lowest cost. Determine each step's cost and the duration of the project. Length of Path (weeks) H D, F A weeks at an additional cost (in $) of $ A U B B D, F G, H Present Cost D, F $11,000 $20,000 $9,000 $25,000 $20,000 $20,000 $15,000 $12,000 $10,000 Accelerated Cost $16,000 $26,000 $21,000 $29,000 $34,000 $31,000 $24,000 $17,000
Activity b Immediate a m Predecessor (days) A 1 3 B 0.5 1 1.5 A C 4 6 8 A D 5 7 B E 1 3 F 12 D G 7 10 13 С, F H 1 3 C I 2 4 H J 1 2 3 E, G, I K 0.5 1 1.5 H 1. Compute the most probable or mean time, t. Indicate your answers in the table above. 2. Construct the Network Diagram. Determine the Early Start and Early Finish of each of the activities. Determine the total duration of the project. Total Duration of the Project =
Q6. Following are the activities of a Project, please consider them for answering the questions below: Duration Activity Predecessor(s) (days) 4 В A B 6 C, D С. D E, F E 5 G D 4 I 6. J Н. I 3 K J 3 a) Draw Gantt chart for the above table b) Draw Labeled Network Diagram and high light critical path. c) Calculate total duration of the project d) Make a list of all Critical Activities e) Make a list of all Non Critical Activities f) Find Float/ Slack for Each Activity.
2. Three activities are candidates for crashing on a CPM network. Activity details are in the table below. Activity Normal Time Normal Cost Crash Duration Crash Cost A 9 days $8,000 7 days $12,000 B 5 days $2,000 3 days $10,000 с 12 days $9,000 11 days $12,000 a. What is the crash cost per unit time for activity A? b. What is the crash cost per unit time for activity B? c. Which activity should be crashed first to cut one day from the project's duration; how much is added to project cost? d. Which activity should be the next activity crashed to cut a second day from the project's duration; how much is added to project cost? e. Assuming no other paths become critical, how much can this project be shortened at what total added cost?
Q1) In the following table, the predecessor information and three time estimates are given for each activity. Optimistic Most Likely Pessimistic Time Time Time Activity Predecessor A b m A 7 8. 6. 10 12 A 7 14 А, В C, D 4 1 3 7 a) Draw the AON project network diagram. b) Calculate the expected time of each activity? (Round each number off to nearest 1 decimal place, e.g., 1.23333 can be rounded off to 1.2) c) Calculate the variance of the time for each activity? (Round each number off to nearest 1 decimal place, e.g., 1.255555 can be rounded off to 1.3) d) Find the critical path. What are the activities on the critical path? e) What is the expected completion time of the Project? f) What is the probability that the project will finish before expected completion time + 4 days? 8) What is the probability that the project will finish before expected completion time + 8 days? FORMULAE Z value 0,5 Probability 0,69 0,84 0,93 0,98 0,99 1,00 a+4m+b (), Τ Σt, , στε Ote T- TE 1,5 2 OTE 2,5 3 3.
0 5 A5 A What is the Early Finish for Activity B? A: 10 B: 12 C: 3 Answer: 0 10 B 10 D: 13 0 10 с 3 If the network was Contiguous, what would be the Early Start for Activity C? A: 5 C: 3 B: 10 D: 7 Answer:
Given the information below, what are the estimated expected (mean) times (in weeks) for activities A-H? What are the estimated standard deviations (in weeks) in the times for activities A-H?
9.4. (LO 9.5) Construct a network from the information in the following table, identify all the paths in the network, calculate the length of each, and indicate the critical path. Activity Activity Predecessor Time (weeks) 1 7 10 1 6. 4 2 2 4 3, 4 3 7 5, 6 2 9.5. (LO 9.5) For the network in Problem 9.4, determine the earliest start and finish times, latest start and finish times, and slack for each activity. Indicate how the critical path would be determined from this information.
Mueller & Associates is a urban planning firm that is designing a new public park in an Omaha suburb. Coordination of the architect and subcontractors will require a major effort to meet the 42-week completion date requested by the owner. The Mueller project manager prepared the following project network. Start A B C Activity Optimistic Most Probable D E TI F Estimates of the optimistic, most probable, and pessimistic times (in weeks) for the activities are as follows. G H 4 6 6 3 6 5 сл 10 A LO 5 8 7 12 5 9 8 B 15 с 6 D Pessimistic 12 8 18 7 18 17 20 F 13 E G H Finish
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