OPERATIONS MANAGEMENT IN THE SUPPLY CHAIN: DECISIONS & CASES (Mcgraw-hill Series Operations and Decision Sciences)
7th Edition
ISBN: 9780077835439
Author: Roger G Schroeder, M. Johnny Rungtusanatham, Susan Meyer Goldstein
Publisher: McGraw-Hill Education
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Textbook Question
Chapter 13, Problem 5DQ
Define the terms critical path, ES, and LF.
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The Stone River Textile Mill was inspected by OSHA and found to be in violation of a number of safety regulations. The OSHA inspectors ordered the mill to alter some existing machinery to make it safer (add safety guards, etc.); purchase some new machinery to replace older, dangerous machinery; and relocate some machinery to make safer passages and unobstructed entrances and exits. OSHA gave the mill only 35 weeks to make the changes; if the changes were not made by then, the mill would be fined $300,000. The mill determined the activities in a CPM/PERT network that would have to be completed and then estimated the indicated activity times, as shown in the following table: Construct the project network for this project and determine the following: a. Expected activity times b. Earliest and latest activity times and activity slack c. Critical path d. Expected project duration and variance e. The probability that the mill will be fined $300,000
21. The following table provides the information necessary to construct a project network and project crash data:
Activity
(i, j)
Activity Predecessor
Activity Time (weeks)
Normal Crash
Activity Cost
Normal Crash
a
(1,2)
---
16
8
$2000
$4400
b
(1,3)
---
14
9
1000
1800
c
(2,4)
a
8
6
500
700
d
(2,5)
a
5
4
600
1300
e
(3,5)
b
4
2
1500
3000
f
(3,6)
b
6
4
800
1600
g
(4,6)
c
10
7
3000
4500
h
(5,6)
d, e
15
10
5000
8000
a. Construct the project network
b. Manually crash the network to 28 weeks
Note:-
Do not provide handwritten solution. Maintain accuracy and quality in your answer. Take care of plagiarism.
Answer completely.
You will get up vote for sure.
Define the terms below
(i) Path Analysis
(ii) Path Model
Chapter 13 Solutions
OPERATIONS MANAGEMENT IN THE SUPPLY CHAIN: DECISIONS & CASES (Mcgraw-hill Series Operations and Decision Sciences)
Ch. 13 - How, precisely, does project scheduling differ...Ch. 13 - How would you, after the fact, audit a project to...Ch. 13 - Prob. 3DQCh. 13 - Contrast and compare CPM and PERT as...Ch. 13 - Define the terms critical path, ES, and LF.Ch. 13 - What is the management significance of finding the...Ch. 13 - Prob. 7DQCh. 13 - What is meant by the need to make trade-offs...Ch. 13 - Why are a forward pass and a backward pass needed...Ch. 13 - What is the definition of the earliest and latest...
Ch. 13 - A public accounting firm requires the following...Ch. 13 - The following activities are required in starting...Ch. 13 - A construction project has the following network...Ch. 13 - A plant start-up is based on the following...Ch. 13 - An entrepreneur is starting a new business. The...Ch. 13 - Prob. 6PCh. 13 - Construction of a building is based on the...Ch. 13 - The professor from problem 6 is considering...
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- Problem 9-14 (Algorithmic) Davison Construction Company is building a luxury lakefront home in the Finger Lakes region of New York. Coordination of the architect and subcontractors will require a major effort to meet the 44-week (approximately 10-month) completion date requested by the owner. The Davison project manager prepared the following project network: B F H Start C G Finish D E Estimates of the optimistic, most probable, and pessimistic times (in weeks) for the activities are as follows: Activity Optimistic Most Probable Pessimistic A 4 9 14 B 5 7 3 4 D 8 11 14 7 17arrow_forwardA farm owner is going to erect a maintenance building with connecting electrical gen- erator and water tank. The activities, activity descriptions and estimated durations are given in the following table. Construct the AOA network for this project, identify the critical path and construct a Gantt chart for the project. Description Excavate Erect building Install generator Install tank Activity A Predecessor Duration 2 B A 6 A 4 D A E Install maintenance equipment В 4 F Connect generator and tank building B,C,D 5 G Paint finish В 3 H Check out facility E,F 2arrow_forwardDEFINE Critical path analysisarrow_forward
- Consider the following project network and activity times (in days). E Start Finish D F G Activity | A B C D EF G Time 3 5 6 .2 The crashing data for this project are as follows: Time (days) Cost ($) Activity Normal Crash Normal Crash 800 1,200 2,000 A 2 1,400 В 2 1 1,900 3 2,800 1,500 1,800 2,300 E 6 4 2,800 1,000 1,000 F 2 1 600 G 2 1 500 a. Find the critical path and the expected project completion time. b. What is the total project cost using the normal times? Assume that management desires a 12-day project completion time. c. Formulate a linear programming model that can be used to assist with the crashing decisions. d. What activities should be crashed? e. What is the total project cost for the 12-day completion time? 2.arrow_forwardNikos Anastopoulos of EMPROSS Strategic IT Consultants, leads the development of a new football stadium. He developed the activities, durations, and predecessor relationships in the following table for delivering company valuations. Activity Predecessor Duration in Weeks A - 5 B - 3 C A, B 8 D C 3 E - 4 F E 10 G F 8 H E 18 I D 20 J D, G, I 7 K I 5 L H 10 6A. Draw the Network Diagram, and identify and discuss the project duration and the critical path using the following activity notation: the first pic: First: Draw the precedence diagram. Second: Using the notation given identify the duration of the project: you can type it. Third: identify the critical part and explain the critical path. Fourth: Explain your answer. This can be done by describing the process and the observations done once the answer has been found. 6B. Draw the project’s Gantt chart First: The…arrow_forwardIdentify and briefly discuss at least three (3) risks that may be associated with this project.Kennedy/Brydon Interchange Project The Kennedy/Brydon Interchange has two lanes of traffic coming in from all four directions. For this project the requirement is to: - Create three lanes of traffic coming into the intersection from all four directions - Add center lanes in all four directions coming into the intersection - The new three lanes and center lanes must start a half mile from the intersection in all four directions - The new traffic pattern must blend with existing lane patterns that go into the intersection, from half a mile, in all four directions - The new traffic light signals at the interchange must be synchronized with the next three traffic light signals coming into the interchange, from half a mile, in all four directionsarrow_forward
- The table below contains information about an environmental clean-up project in the township of Hiles. Shorten the project three weeks by finding the minimum-cost schedule. Assume that project indirect costs and penalty costs are negligible. Identify activities to crash while minimizing the additional crash costs. Q Activity A B C D E The cost of shortening of project is $ F G H I Normal Time (weeks) 5 7 7 7 1 3 5 4 2 Crash Time (weeks) 4 4 Activity A B C D E 6 4 6 1 3 4 2 2 Cost to Crash ($ per week) . (Enter your response as a whole number.) 300 50 300 250 200 200 Fill in the table below with the activity times after crashing to show the resulting schedule. (Enter your responses as whole numbers.) Time according to schedule (weeks) Time according to schedule (weeks) Immediate Predecessor(s) Activity F G H I None None A A B 3~~ C, D D, E F Garrow_forwardRoger Ginde is developing a program in supply chain management certification for managers. Ginde has listed a num- ber of activities that must be completed before a training program of this nature could be conducted. The activities, immediate pre-decessors, and times appear in the accompanying table: A—2 B—5 C—1 D B 10 E A, D 3 FC6 G E, F 8 A) Develop an AON network for this problem.b) What is the critical path?c) What is the total project completion time? Please answer A B C and show workarrow_forwardDraw CPM network of activities tabulated below: 1. Calculate the expected duration and the standard deviation for the critical path.arrow_forward
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