Principles Of Operations Management
11th Edition
ISBN: 9780135173930
Author: RENDER, Barry, HEIZER, Jay, Munson, Chuck
Publisher: Pearson,
expand_more
expand_more
format_list_bulleted
Concept explainers
Videos
Textbook Question
Chapter 9, Problem 13P
Illinois Furniture, Inc., produces all types of office furniture. The “Executive Secretary” is a chair that has been designed using ergonomics to provide comfort during long work hours. The chair sells for $130. There are 480 minutes available during the day, and the average daily demand has been 50 chairs. There are eight tasks:
a) Draw a precedence diagram of this operation.
b) What is the cycle time for this operation?
c) What is the theoretical minimum number of workstations?
d) Assign tasks to workstations.
e) What is the idle time per cycle?
f) How much total idle time is present in an 8-hour shift?
g) What is the efficiency of the assembly line, given your answer in (d)?
a)
Expert Solution
Summary Introduction
To draw: The precedence diagram.
Answer to Problem 13P
Explanation of Solution
Given information:
| Task | Time (minutes) | Immediate predecessors |
| A | 4 | - |
| B | 7 | - |
| C | 6 | A, B |
| D | 5 | C |
| E | 6 | D |
| F | 7 | E |
| G | 8 | E |
| H | 6 | F, G |
| Total | 49 |
- The chair is sold for $130.
- Number of minutes available = 480 / day.
- Average daily demand is 50 chairs.
Precedence diagram:
b)
Expert Solution
Summary Introduction
To determine: The cycle time.
Introduction:
Cycle time:
Cycle time is the total time taken to complete an unit of work from the beginning of the process to the end of the process.
Answer to Problem 13P
The cycle time is 9.6 minutes / unit.
Explanation of Solution
Given information:
| Task | Time (minutes) | Immediate predecessors |
| A | 4 | - |
| B | 7 | - |
| C | 6 | A, B |
| D | 5 | C |
| E | 6 | D |
| F | 7 | E |
| G | 8 | E |
| H | 6 | F, G |
| Total | 49 |
- The chair is sold for $130.
- Number of minutes available = 480 / day.
- Average daily demand is 50 chairs.
Formula to calculate cycle time:
Calculation of cycle time:
The cycle time is 9.6 minutes / unit.
c)
Expert Solution
Summary Introduction
To determine: The theoretical minimum number of workstations.
Answer to Problem 13P
The theoretical minimum number of workstations is 6 workstations.
Explanation of Solution
Given information:
| Task | Time (minutes) | Immediate predecessors |
| A | 4 | - |
| B | 7 | - |
| C | 6 | A, B |
| D | 5 | C |
| E | 6 | D |
| F | 7 | E |
| G | 8 | E |
| H | 6 | F, G |
| Total | 49 |
- The chair is sold for $130.
- Number of minutes available = 480 / day.
- Average daily demand is 50 chairs.
Formula to calculate theoretical minimum number of workstations:
Calculation of theoretical minimum number of workstations:
The theoretical minimum number of workstations is 6 workstations.
d)
Expert Solution
Summary Introduction
To assign: The different tasks to different workstations.
Explanation of Solution
Assignment of different tasks to different workstations:
Task A is assigned to station 1. Task B is assigned to station 2. Task C is assigned to station 3. Task D is assigned to station 4. Task E is assigned to station 5. Task G is assigned to station 6. Task F is assigned to station 7. Task H is assigned to station 8.
e)
Expert Solution
Summary Introduction
To determine: The idle time per cycle.
Answer to Problem 13P
The idle time is 15 minutes / cycle.
Explanation of Solution
Given information:
| Task | Time (minutes) | Immediate predecessors |
| A | 4 | - |
| B | 7 | - |
| C | 6 | A, B |
| D | 5 | C |
| E | 6 | D |
| F | 7 | E |
| G | 8 | E |
| H | 6 | F, G |
| Total | 49 |
- The chair is sold for $130.
- Number of minutes available = 480 / day.
- Average daily demand is 50 chairs.
Calculation of idle time per cycle:
The idle time is 15 minutes / cycle.
f)
Expert Solution
Summary Introduction
To determine: The total idle time present in an 8 hour shift.
Answer to Problem 13P
The total idle time present in an 8 hour shift is 15 hours.
Explanation of Solution
Given information:
| Task | Time (minutes) | Immediate predecessors |
| A | 4 | - |
| B | 7 | - |
| C | 6 | A, B |
| D | 5 | C |
| E | 6 | D |
| F | 7 | E |
| G | 8 | E |
| H | 6 | F, G |
| Total | 49 |
- The chair is sold for $130.
- Number of minutes available = 480 / day.
- Average daily demand is 50 chairs.
Calculation of total idle time present in an 8 hour shift:
There are 480 minutes available in a day. The longest operation time is 8 minutes. Therefore the number of cycles in a day is given by:
The total idle time is calculated by multiplying the number of cycles with the total idle time per cycle.
The total idle time present in an 8 hour shift is 15 hours.
g)
Expert Solution
Summary Introduction
To determine: The efficiency.
Introduction:
Efficiency:
Efficiency is the measure of what is actually produced as opposed to what can be theoretically produced with the same amount of resources.
Answer to Problem 13P
The efficiency is 76.6%.
Explanation of Solution
Given information:
| Task | Time (minutes) | Immediate predecessors |
| A | 4 | - |
| B | 7 | - |
| C | 6 | A, B |
| D | 5 | C |
| E | 6 | D |
| F | 7 | E |
| G | 8 | E |
| H | 6 | F, G |
| Total | 49 |
- The chair is sold for $130.
- Number of minutes available = 480 / day.
- Average daily demand is 50 chairs.
Formula to calculate efficiency:
Calculation of efficiency:
The efficiency is 76.6%
Want to see more full solutions like this?
Subscribe now to access step-by-step solutions to millions of textbook problems written by subject matter experts!
Students have asked these similar questions
At the Ford automobile Highland plant, assume the one-millionth vehicle was produced in 1916 at a cost of $8084 (in 2013 US$), by how much did the Ford company reduce his cost with each doubling of cumulative output from 1916 to 1927?
At the Ford automobile Highland plant,in 1913, how long did the average worker stay with the plant and what was the average tenure of a worker?
Community Federal Bank in Dothan, Alabama, recently increased its fees to customers who use employees as tellers. Management is interested in whether its new tee policy has increased the number of customers now using its automatic teller machines to that point that more machines are required. The following table provides the number of automatic teller transactions by week. Use trend projection with regression to forecast usage for weeks 13-16.
Chapter 9 Solutions
Principles Of Operations Management
Ch. 9 - Prob. 1EDCh. 9 - Prob. 1DQCh. 9 - Prob. 2DQCh. 9 - Prob. 3DQCh. 9 - Prob. 4DQCh. 9 - Prob. 5DQCh. 9 - Prob. 6DQCh. 9 - Prob. 7DQCh. 9 - Prob. 8DQCh. 9 - Prob. 9DQ
Ch. 9 - Prob. 10DQCh. 9 - Prob. 11DQCh. 9 - Prob. 12DQCh. 9 - Prob. 13DQCh. 9 - Prob. 14DQCh. 9 - Prob. 15DQCh. 9 - Prob. 16DQCh. 9 - Prob. 17DQCh. 9 - Prob. 18DQCh. 9 - Prob. 1PCh. 9 - Prob. 2PCh. 9 - Prob. 3PCh. 9 - Roy Creasey Enterprises, a machine shop, is...Ch. 9 - Adam Munson Manufacturing, in Gainesville,...Ch. 9 - Prob. 6PCh. 9 - Prob. 7PCh. 9 - Prob. 8PCh. 9 - Prob. 9PCh. 9 - Six processes are to be laid out in six areas...Ch. 9 - Stanford Rosenberg Computing wants to establish an...Ch. 9 - Illinois Furniture, Inc., produces all types of...Ch. 9 - Prob. 14PCh. 9 - The Action Toy Company has decided to manufacture...Ch. 9 - Prob. 16PCh. 9 - Prob. 17PCh. 9 - Prob. 18PCh. 9 - Prob. 19PCh. 9 - Prob. 20PCh. 9 - Prob. 21PCh. 9 - Prob. 22PCh. 9 - Prob. 23PCh. 9 - Prob. 25PCh. 9 - Prob. 26PCh. 9 - Prob. 27PCh. 9 - Prob. 1CSCh. 9 - Prob. 2CSCh. 9 - Henry Coupe, the manager of a metropolitan branch...Ch. 9 - Prob. 4CSCh. 9 - Prob. 1.1VCCh. 9 - Prob. 1.2VCCh. 9 - Prob. 1.3VCCh. 9 - Prob. 1.4VCCh. 9 - Prob. 1.5VCCh. 9 - Prob. 1.6VCCh. 9 - Prob. 2.1VCCh. 9 - Prob. 2.2VCCh. 9 - Prob. 2.3VC
Knowledge Booster
Learn more about
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
- Davison Electronics manufactures three LED television monitors, identified as Model A, Model B, and Model C. Davison Electronics four manufacturing plants. Each model has its lowest possible production cost when produced at Plant 1. However, Plant 1 does not have the capacity to handle the total production of all three models. As a result, at least some of the production must be routed to the other manufacturing plants. The following table shows the minimum production requirements for next month, the plant capacities in units per month, and the production cost per unit at each plant: Model Production Cost per Unit Minimum Production Requirements Plant 1 Plant 2 Plant 3 Plant 4 A $25 $28 $37 $34 48,000 B $26 $35 $36 $41 75,000 C $20 $31 $26 $23 60,000 Production Capacity 65,000 50,000 32,000 43,000 Davison’s objective is to determine the cost-minimizing production planarrow_forwardAnecdotally, entrepreneurs frequently encounter two critical dilemmas in managing human resources: the timing of hiring and the decision regarding hiring a generalist versus a specialist for their growing venture. Deciding when to expand a team is crucial, as premature hiring (i.e., hiring too soon) can strain resources, while delayed hiring (i.e., hiring too late) might hinder growth opportunities. Moreover, the choice between hiring a generalist or a specialist depends on the specific needs and stage of the venture, with each option presenting distinct advantages and challenges. To address these issues, a management scholar seeks to identify the factors shaping the hiring cycle throughout the entrepreneurial journey and to understand the criteria for choosing between generalists and specialists at various stages of a venture. The scholar has assembled a sample of 20 experienced South African entrepreneurs who have encountered both failure and success in the financial technology…arrow_forward3. [25 pts.] Four projects are available for investment. The projects require the cash flows and yield the net present values (NPV) (in millions) shown in the following table. Project id. 1 2 Cash outflow at time 0 (million Lira) 8 8 NPV (million Lira) 12 11 3 4 6 5 8 6 If 20 million Lira is available for investment at time 0, find the investment plan that maximizes NPV. All investments are required to be 0 or 1 (fractional investment values are not permitted). a. Formulate the mathematical model. (Write the decision variables, objective function and the constraints.) [10 pts.] b. Find the optimal solution by using Branch and Bound method (Draw the branch and bound tree clearly, write also lower bounds(LB)) (Left branches x=0, right branches x =1) [15 pts.].arrow_forward
- examine the production concept and operations management, what are the key steps required to achieve success? Be specific in your response.arrow_forwardProduce a 3000 report with references on one international organization of your choice and Address the following: Provide a brief introduction of the organisation and sector it operates in, including its mission and vision statements, its core values, a summary of its financial performance and a general overview of the business’s operational activities. From the relevant literature explain the Total Quality Management (TQM) processes the chosen organization follows and identify one quality challenge/issue that the organization faced or is currently facing. Explain how the organization managed/or still managing the particular quality challenge/issue. Critically analyze whether the organization failed or succeeded in achieving and maintaining quality performance. Provide a few critical recommendations for business managers in order to highlight the importance of Total Quality Management (TQM) within an organization.arrow_forward問題2 Production system design involves determining the arrangement of workstations and the... O allocation of resources to workstations design of the process O production schedule all of the abovearrow_forward
- Elaborate on the need for and the benefits of an effective supply chain management (SCM) system in the context of a globalized and networked economy. In your answer, explain how organizations like Dell and Hewlett-Packard leverage supply chain networks to maintain competitiveness, and analyse the impact of globalization, technological advancements, and business environment changes on supply chain structures. Additionally, evaluate the key components of SCM, including distribution network configuration, inventory management, and cash-flow management, and discuss how these components contribute to creating an effective and integrated supply chain. (15) 3.2. Critically evaluate the requirements for effective inventory management within an organization. In your answer, discuss the importance of inventory accounting systems, the role of cost information (holding, ordering, and shortage costs), and the significance of classification systems like ABC analysis. Additionally, analyse how…arrow_forwardAssess the role of EDI in ensuring supply chain security and data integrity. How does EDI contribute to reducing vulnerabilities in supply chain operations, and what best practices should organizations adopt to maintain a secure and reliable EDI system? (10) 1.3. Examine how the adoption of modern EDI systems influences the strategic decision-making process in supply chain management. How does EDI provide supply chain managers with actionable insights, and what are the implications of these insights for long-term supply chain planning? (10) 1.4. Evaluate the potential challenges and risks associated with the modernization of EDI systems in supply chain management. How can organizations effectively manage these challenges to ensure successful EDI implementation and ongoing optimization? (10)arrow_forwardAnalyse the impact of integrating EDI (Electronic Data Interchange) with API (Application Programming Interface) on supply chain management, particularly focusing on how this integration enhances information flow and operational efficiency. Consider the challenges that might arise from this integration in terms of managing legacy systems alongside modern applications.arrow_forward
- 1) View the video What is Operations Management (14.01 minutes, Ctrl+Click on the link); what are your key takeaways (tie to one or more of the topics discussed in Chapters 1 and/or 2) after watching this video. (https://www.viddler.com/embed/d01189e1) Note: As a rough guideline, please try to keep the written submission to one or two paragraphs. 2) View the video What McDonald’s is serving up at its new CosMc’s Chain (3.42 mins, Ctrl+Click in the link), and answer the following questions: (https://www.youtube.com/watch?v=k7ojpUzE8q4) i) From a strategic perspective, why do you think McDonald’s is opting for this new chain rather than trying to launch the new menu in its existing restaurants? ii) What factors do you think in McDonald’s external and internal environments are driving its decision to open the CosMc’s locations? iii) How do you think this format will improve McDonald’s profit margin as compared to its regular fast-food restaurants? Note: As a…arrow_forwardSince the end of World War II, globalization has steadily increased with rapid expansion around the turn of the 21st century. What are some of the forces driving globalization and international business? What are some of the challenges of engaging in international business compared to doing business in your home country?arrow_forwardPS.53 Brother I.D. Ricks is a faculty member at BYU-Idaho whose grandchildren live in Oklahoma and California. He and his wife would like to visit their grandchildren at least once a year in these states. They currently have one vehicle with well over 100,000 miles on it, so they want to buy a newer vehicle with fewer miles and that gets better gas mileage. They are considering two options: (1) a new subcompact car that would cost $18,750 to purchase or (2) a used sedan that would cost $12,750.They anticipate that the new subcompact would get 37 miles per gallon (combined highway and around town driving) while the sedan would get 26 miles per gallon. Based on their road tripping history they expect to drive 13,000 miles per year. For the purposes of their analysis they are assuming that gas will cost $2.93 per gallon.Question: How many miles would the Ricks need to drive before the cost of these two options would be the same? (Display your answer to the nearest whole number.) (Hint:…arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
Practical Management ScienceOperations ManagementISBN:9781337406659Author:WINSTON, Wayne L.Publisher:Cengage,
MarketingMarketingISBN:9780357033791Author:Pride, William MPublisher:South Western Educational Publishing
Purchasing and Supply Chain ManagementOperations ManagementISBN:9781285869681Author:Robert M. Monczka, Robert B. Handfield, Larry C. Giunipero, James L. PattersonPublisher:Cengage Learning
Management, Loose-Leaf VersionManagementISBN:9781305969308Author:Richard L. DaftPublisher:South-Western College Pub
Practical Management Science
Operations Management
ISBN:9781337406659
Author:WINSTON, Wayne L.
Publisher:Cengage,
Marketing
Marketing
ISBN:9780357033791
Author:Pride, William M
Publisher:South Western Educational Publishing
Purchasing and Supply Chain Management
Operations Management
ISBN:9781285869681
Author:Robert M. Monczka, Robert B. Handfield, Larry C. Giunipero, James L. Patterson
Publisher:Cengage Learning
Management, Loose-Leaf Version
Management
ISBN:9781305969308
Author:Richard L. Daft
Publisher:South-Western College Pub
Inventory Management | Concepts, Examples and Solved Problems; Author: Dr. Bharatendra Rai;https://www.youtube.com/watch?v=2n9NLZTIlz8;License: Standard YouTube License, CC-BY