Principles Of Operations Management
11th Edition
ISBN: 9780135173930
Author: RENDER, Barry, HEIZER, Jay, Munson, Chuck
Publisher: Pearson,
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Chapter 3, Problem 18P
A renovation of the gift shop at Orlando Amway Center has six activities (in hours). For the following estimates of a, m, and b, calculate the expected time and the standard deviation for each activity:
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We are the project manager for an IT project in our company. We identified the following top-level project tasks and estimated durations to standup a small test lab for the project:
Identify test lab building/space requirements and possible locations(8days)
Select best location for lab (1day)
Once the best location is selected, immediately start the next two tasks:
Prepare lab space with power and cabling (3days)
Identify/procure required specialized test lab hardware/software(5)
Once the lab space is prepared, install/check out available infrastructure hardware/software(1day).
Once the specialized software/hardware is received and the infrastructure hardware/software is installed/checked out, install/checkout specialized software/hardware (2days)
Once all tasks are completed, conduct the final inspection (1 day).
Let's create a PERT/CPM chart for this project and identify the overall project duration and critical path.
The table below contains data for the installation of new equipment in a manufacturing process at Excello Corporation. Your company is responsible for the installation project. Indirect costs are $12,000 per
week, and a penalty cost of $6,000 per week will be incurred by your company for every week the project is delayed beyond week 12.
Activity
A
B
с
D
E
F
G
Immediate
Predecessor(s)
AB
Activity
A
B
с
D
A
C
D, E
E
Normal Time Crash Time
(weeks) (weeks)
3
1
2
2
1
3
4
1
6
3
Time according to
schedule (weeks)
1
a. What is the shortest time duration for this project regardless of cost?
The shortest project duration regardless of cost is 9 weeks. (Enter your response as a whole number.)
b. What is the minimum total cost associated with completing the project in 12 weeks?
The minimum total cost to complete the project in 12 weeks is $ 203500. (Enter your response as a whole number.)
c. What is the total time of the minimum-cost schedule? (Enter your responses as whole numbers.)
The total…
The product development group at “Griffin” Company has already worked on new computer software products that has potential to know a large market share. Via an outside source, London Management has learned that a competitor is working to bring a similar product to market. As a result, London's top management increased its pressure on the product development group. Group leaders have turned to CPM / PERT as an aid to scheduling remaining activities before new products can be brought to market. The estimated time of activity in a day is as follows
a.Create the the network if it is accelerated according to the schedule above
b.Find the cost and the duration
c.Determine the path and critical activities
Chapter 3 Solutions
Principles Of Operations Management
Ch. 3 - Ethical Dilemma Two examples of massively...Ch. 3 - Give an example of a situation in which project...Ch. 3 - Explain the purpose of project organization.Ch. 3 - What are the three phases involved in the...Ch. 3 - What are some of the questions that can be...Ch. 3 - Define work breakdown structure. How is it used?Ch. 3 - What is the use of Gantt charts in project...Ch. 3 - What is the difference between an...Ch. 3 - What is the significance of the critical path?Ch. 3 - what would a project manager have to do to crash...
Ch. 3 - Prob. 10DQCh. 3 - Define earliest start, earliest finish, latest...Ch. 3 - Students are sometimes confused by the concept of...Ch. 3 - Prob. 13DQCh. 3 - Prob. 14DQCh. 3 - Would a project manager ever consider crashing a...Ch. 3 - How is the variance of the total project computed...Ch. 3 - Describe the meaning of slack, and discuss how it...Ch. 3 - How can we determine the probability that a...Ch. 3 - Name some of the widely used project management...Ch. 3 - What is the difference between the waterfall...Ch. 3 - The work breakdown structure (WBS) for building a...Ch. 3 - James Lawson has decided to run for a seat as...Ch. 3 - Prob. 3PCh. 3 - Refer to the table in Problem 3.3. a) Draw the AON...Ch. 3 - Draw the activity-on-node (AON) project network...Ch. 3 - Given the activities whose sequence is described...Ch. 3 - Prob. 7PCh. 3 - Roger Ginde is developing a program in supply...Ch. 3 - Prob. 9PCh. 3 - The activities described by the following table...Ch. 3 - Prob. 11PCh. 3 - The activities needed to build a prototype laser...Ch. 3 - Prob. 13PCh. 3 - Dave Fletcher (sec Problem 3.12) was able to...Ch. 3 - Ross Hopkins, president of Hopkins Hospitality,...Ch. 3 - A renovation of the gift shop at Orlando Amway...Ch. 3 - Kelle Carpet and Trim installs carpet in...Ch. 3 - The estimated times and immediate predecessors for...Ch. 3 - Prob. 21PCh. 3 - Four Squares Productions, a firm hired to...Ch. 3 - Prob. 23PCh. 3 - Prob. 24PCh. 3 - Prob. 25PCh. 3 - Prob. 28PCh. 3 - Prob. 29PCh. 3 - Prob. 30PCh. 3 - Development of Version 2.0 of a particular...Ch. 3 - Prob. 32PCh. 3 - Prob. 33PCh. 3 - Prob. 1.1VCCh. 3 - Prob. 1.2VCCh. 3 - Project Management at Arnold Palmer Hospital The...Ch. 3 - Prob. 1.4VCCh. 3 - Managing Hard Rocks Rockfest At the Hard Rock...Ch. 3 - Managing Hard Rocks Rockfest At the Hard Rock...Ch. 3 - Managing Hard Rocks Rockfest At the Hard Rock...Ch. 3 - Managing Hard Rocks Rockfest At the Hard Rock...
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- The product development group at “Griffin” Company has already worked on new computer software products that has potential to know a large market share. Via an outside source, London Management has learned that a competitor is working to bring a similar product to market. As a result, London's top management increased its pressure on the product development group. Group leaders have turned to CPM / PERT as an aid to scheduling remaining activities before new products can be brought to market. The estimated time of activity in a day is as follows Question: Create an initial network Find the cost and the duration Determine the path and critical activitiesarrow_forwardThe Mobicom Corporation is in the design phase of a system project. The project manager wants to develop a network analysis diagram to plan the activities of designing the system outputs. The activities are as follows. ACTIVITY PRECEDING TIME[WEEKS] A ----- 5 B ---- 6 C ---- 4 D A,B 7 E C 8 F C,D 10 G D 8 Required Draw a network diagram for the design phasearrow_forwardThe table below contains data for the installation of new equipment in a manufacturing process at Excello Corporation. Your company is responsible for the installation project. Indirect costs are $12,000 per week, and a penalty cost of $8,000 per week will be incurred by your company for every week the project is delayed beyond week 12. Activity Immediate Predecessor(s) A B с D E F G || D, E Normal Time Crash Time Normal Cost (weeks) ($) 3 7,000 2 3,000 3 12,000 4 12,000 1 8,000 6 5,000 3 9,000 (weeks) 1 2 1 3 1 4 2 D Crash Cost ($) 14,000 3,000 40,000 22,000 8,000 13,000 16,000arrow_forward
- To complete the rotor assembly for an experimental spacecraft, Gilbert has laid out nine major activities involved. These activities have been labelled A to I in the table below, which also shows their estimated completion times (in weeks) and their immediate predecessors. EVENTS AND ACTIVITIES FOR ROTOR ASSEMBLY ACTIVITIES TIMES (IN WEEKS) PRECEDING EVENT A M B A 1 2 3 - B 2 3 4 A C 4 5 6 A D 8 9 10 A E 2 5 8 B F 4 5 6 B, C G 1 2 3 F, D H 1 3 5 E, F I 2 4 6 H, G Key: A is optimist time, M is the most likely time and B is the pessimistic time. a) Calculate the expected time for each activity b) Draw a Gantt Chart from the same information above c) State the critical path and the maximum number of weeks the project will take to be completed. d) Discuss the pros and cons of using the Gantt chart as a planning and scheduling tool?arrow_forwardDr. Ell has been given a budget of $5,000 to organize a conference at her university in less than 2.5 months' time (9 weeks) via an educational grant. She has a team of 2 research assistants and after some deliberation, they identified the following activities that are required to be completed for hosting a successful conference. Immediate Predecessor Activity A B с D E F G H Description Deciding Dates and Number of sessions Determining Venue for conference Sending out a Call for Papers Inviting Special Speakers Responding to presenters Organizing Sessions with papers Getting registrations and confirmations Last minute Edits and Finalizing Program Dr. Ell has approached you, her student, to help her figure this out, as a part of her Management Science class assignment. Please give your respo with appropriate explanations, tables, and formulas, where relevant, to the following questions: BUAE U H 000000 1. PART 1. PERT/CPM with varying times a. Follow a PERT/CPM model to identify the…arrow_forwardDraw activity Diagram for this scenario.When a customer calls the Agent on the phone, they are asked about the Arrival date and time, and the Destination city. The agent then informs the customer about the available route timings. The customer then selects the appropriate route timings and number of seats he wants to reserve. The agent confirms if seats are available, then asks the customer for his name and phone number. Finally, the agent informs to the customer about successful reservation. "When a customer calls the Agent on the phone, they are asked about the Arrival date and time, and the Destination city. The agent then informs the customer about the available route timings. The customer then selects the appropriate route timings and number of seats he wants to reserve. The agent confirms if seats are available, then asks the customer for his name and phone number. Finally, the agent informs to the customer about successful reservation"arrow_forward
- Under the ZY company’s current warehouse operation, warehouse clerk dispatch order-picking personnel to fill each order and have the goods moved to the warehouse shipping area. Because of the high labour costs and relatively low productivity of hand order-picking, management has decided to automate the warehouse operation by installing a computer-controlled order system, along with a conveyor system for moving goods from storage to the warehouse shipping area. ZY’s director of material management has been named the project manager in charge of automated warehouse system. After consulting with members of the engineering staff and warehouse management personnel, the director compiled a list of activities associated with the project. The optimistic, most likely, and pessimistic times (in weeks) have also been provided for each activity, as shown below. Activity A B C D E F G H I J K Description Determine equipment needs Obtained Vendor proposals Select Vendor Order system Design…arrow_forwardWhat's the best way to resolve this problem? 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: Activity a m b Immediate Predecessor(s) Activity a m b Immediate Predecessor(s) A 3 5 9 - G 1 2 3 A, E B 4 5 6 - H 4 6 8 F C 1 2 3 - I 10 11 12 G D 7 8 9 C J 15 17 19 C E 1 3 5 B, D K 4 8 12 H, I F 5 10 15 A, E b) Activities on the critical path for the project are C - D - E - F - H - K c) For the given project, the earliest start (ES) and earliest finish (EF) are: For the given project, the latest start (LS) and latest finish (LF) are: (Round your responses to two decimal places.) Referring to the…arrow_forwardScott and Associates, Inc., is accounting firm that has three new clients. Project leaders will be assigned to the three clients. Based on the different backgrounds and experiences of the leaders, the various leader- client assignments differ in terms of projected completing times. The possible assignments and the estimated completion times in days are as follows: Client Project Leader 1 2 3 Abby 10 16 32 Bovi 14 22 40 Claire 22 24 34 Develop a network representation of this problem. Formulate the problem as a linear program.arrow_forward
- Maladroit Cosmetics Company The plant manager of the Maladroit Cosmetics Company must replace several of her filling machines that have become obsolete. She is about to take delivery of six machines at a total cost of $4 million. These machines must be installed and fully tested in time to be used on a new production line scheduled to begin operation in 6 months. Because this project is important, the plant manager would like to devote as much time as possible to the job, but she is currently handling several other projects. She thinks she has three basic choices: (1) she can handle the project informally out of her office; (2) she can assign the project to a member of her staff; or (3) the company that manufactures the machines can handle the installation project for a fee close to what the installation would cost Maladroit. Questions A. Would you classify the work of installing the six machines as a project? B. Why or why not? C. Explain how the PM might trade off one of the…arrow_forwardOPERATIONS Duration and requirement of workforce for each activity is tabulated below for a network Activity Duration Number of men 1-2 3 5 2-4 2 3 2-3 3 7 3-4 0 0 3-5 3 2 4-5 7 2 3-6 2 1 5-6 6 6 4-6 5 5 Use either PERT or CPM to (i) Draw the network and comment on the scheduling of activities to smoothen the development of the workforce (ii) Re-schedule the activities for smooth development (iii) Find the project schedule if only 4 men are availablearrow_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_forward
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