Practical Operations Management
2nd Edition
ISBN: 9781939297136
Author: Simpson
Publisher: HERCHER PUBLISHING,INCORPORATED
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Question
Chapter 7, Problem 9P
Summary Introduction
Interpretation: Late start time is to be determined when early start time is 7.
Concept Introduction: Critical path is the arrangement of project activities which gives an estimate time duration under which project will be completed. The project activities may include float activities which can be delayed focusing on the shortest time duration.
PERT diagram is a graphical project management tool used to organize and analyze project and its activity. It defines time duration for a project and also for each activity in a project.
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Explain the meaning of the term "project scheduling." While making preliminary estimates of schedules, what considerations need to be given priority?
A project has the activity duration and cost information indicated in the table where all times are in weeks. What is the total cost for completing this project in 50 days?
Activity
Predecessor
Normal Time
Normal Cost
Crash Time
Crash Cost
A
--
8
$12,000
5
$21,000
B
A
12
$20,000
9
$30,000
C
A
15
$24,000
10
$60,000
D
B
3
$10,000
2
$15,000
E
C
9
$17,000
6
$34,000
F
E
7
$5,000
6
$6,000
G
D
8
$14,000
6
$20,000
H
A
12
$22,000
10
$30,000
I
H
6
$50,000
5
$55,000
J
F, G, I
11
$33,000
9
$50,000
The activity times are 3, 4, 2, 5, 7, 2, 2, and 3 days for activities A1 through A8,respectively. What is the critical path?a. A1, A2, A3, A4, A8b. A1, A2, A3, A6, A7, A8c. A1, A2, A5, A7, A8d. None of these options is the critical path.
Chapter 7 Solutions
Practical Operations Management
Ch. 7 - Prob. 1DQCh. 7 - Prob. 2DQCh. 7 - Prob. 3DQCh. 7 - Prob. 4DQCh. 7 - Prob. 5DQCh. 7 - Prob. 6DQCh. 7 - Prob. 1PCh. 7 - Prob. 2PCh. 7 - Prob. 3PCh. 7 - Prob. 4P
Ch. 7 - Prob. 5PCh. 7 - Prob. 6PCh. 7 - Prob. 7PCh. 7 - Prob. 8PCh. 7 - Prob. 9PCh. 7 - Prob. 10PCh. 7 - Prob. 11PCh. 7 - Prob. 12PCh. 7 - Prob. 13PCh. 7 - Prob. 14PCh. 7 - Prob. 15PCh. 7 - Prob. 16PCh. 7 - Prob. 17PCh. 7 - Prob. 18PCh. 7 - Prob. 19PCh. 7 - Prob. 20PCh. 7 - Prob. 21PCh. 7 - Prob. 22PCh. 7 - Prob. 23PCh. 7 - Prob. 24PCh. 7 - Prob. 25PCh. 7 - Prob. 26PCh. 7 - Prob. 27PCh. 7 - Prob. 28PCh. 7 - Prob. 29PCh. 7 - Prob. 30PCh. 7 - Prob. 31PCh. 7 - Prob. 32PCh. 7 - Prob. 1.1QCh. 7 - Prob. 1.2QCh. 7 - Prob. 1.3QCh. 7 - Prob. 1.4QCh. 7 - Prob. 2.1QCh. 7 - Prob. 2.2QCh. 7 - Prob. 2.3Q
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, operations-management and related others by exploring similar questions and additional content below.Similar questions
- In project scheduling, the critical route approach is crucial, but what does it really do?arrow_forwardWhat precisely does the critical route approach achieve, however, and why is it such a vital part of project scheduling?arrow_forwardThe conditions and pert times for constructing a network diagram are given below.-Creation conditions:(0-1) It is the initial activity.(1-2) and (1-3) Activities begin together.It follows activity (2-4) (1-2), activity (3-4) (1-3), and ends together.( 4-5 ) It is the last activity. a-Create the network diagram.b-Calculate the critical path and show it on the diagram.c- If the expiry time is extended by 15 days, how much will the probability of expiry increase?arrow_forward
- In one of the little-known battles of the Civil War, General Tecumseh Beauregard lost the Third Battle of Bull Run because his preparations were not complete when the enemy attacked. If the critical path method had been available, the general could have planned better. Suppose that the following planning network, with activity times in days, had been available: Determine the earliest and latest activity times and the activity slack for the network. Indicate the critical path and the time between the general’s receipt of battle orders and the onset of battle.arrow_forwardThe critical path technique is important in project scheduling, but what exactly does it do?arrow_forwardFrom the following network diagram, draw the unscaled activity bar type based on (a) early start, (b) late startarrow_forward
- Suppose you have a project with a Budget at Completion (BAC) of $250,000 and a projected length of 10 months. After tracking the project for six months, you have collected the information in the table below. a. Complete the table. How do Earned Value SPI (based on $) and Earned Schedule SPI differ? b. Calculate the schedule variances for the project for both Earned Value and Earned Schedule. How do the values differ?arrow_forwardA new project is to be completed. The following activities need to be completed in the order shown, where times are in weeks.A new project is to be completed. The following activities need to be completed in the order shown, where times are in weeks. (attached) You must use two decimal places at all times for expected times when they are not integer(a) Draw the activity network for this problem (b) Determine the Expected Times. (c) Determine the activity schedule (ES, EF, LS, and LF) as well as slack.(d) Determine and state the critical path for this project. (e) What are the expected time and the variance of the project? (f) What is the probability that the project is completed in 22 or fewer weeks. (g) What date should be set such that there is a 94% chance of completion within that time?arrow_forwardThe following represents a project that should be scheduled using CPM a. Complete the table b. Draw the Network Diagram c. What is the critical path? d. What is the expected project completion time?' e. What is the probability of completing this project within 16 days?arrow_forward
- For the activity times and network model below, What is the expected completion time? ________ What is the critical path? ____________ Activity Time A 3 B 2 C 2 D 4 E 3 F 2arrow_forwardEvent Event Predecessor Time A - 2 B A 6 C A 4 D A 2 E B 4 F B;C;D 5 G B 3 H E;F 2 Based on table above : a) create the network planning b) identification of the critical path c) project time requirementsarrow_forward11-17 The following are the activity times for the project in Problem 11-16. Find the earliest, latest, and slack times for each activity. Then find the critical path. ACTIVITY TIME (DAYS) A 3 B 7 C 4 D 2 E 5 F 6 G 3 11-16.arrow_forward
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