Operations Management
17th Edition
ISBN: 9781259142208
Author: CACHON, Gérard, Terwiesch, Christian
Publisher: Mcgraw-hill Education,
expand_more
expand_more
format_list_bulleted
Concept explainers
Videos
Question
Chapter 9, Problem 2CQ
Summary Introduction
To determine: The environmental variable in the given operation.
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
Consider the mixing process shown in the figure. A mixing chamber initially contains 4 liters of a clear liquid. Clear liquid flows into the chamber at a rate of 10 liters per minute. A dye solution having a concentration of 0.25 kilograms per liter is injected into the mixing chamber at a constant rate of liters per minute. When the mixing process is started, the well-stirred mixture is pumped from the chamber at a rate of 10 + r liters per minute.
(a) Develop a mathematical model for the mixing process. Let Q represent the amount of dye in kilograms in the mixture.
(dQ/dt)=?
(b) The objective is to obtain a dye concentration in the outflow mixture of 0.1 kilograms per liter. What injection rate r is required to achieve this equilibrium solution?
r = ?
Would this equilibrium value of r be different if the fluid in the chamber at time t=0 contained some dye? yes, no or maybe?
(c) Assume the mixing chamber contains 4 liters of clear liquid at time t. How many minutes will it take…
. Mary and Tom operate a lemonade stand. They are concerned that the lemonade doesnot taste fresh at the end of the day. Which of the following variables is an environmental variable in their operation?a. The temperature of the lemonade when they take it out of their refrigerator in themorningb. The temperature of the air during the dayc. The temperature of the lemonaded. The temperature of the water used to make the lemonade
The Cause and Effect Diagram for logistic service provider analysis the probability of customer dissatisfaction.
Chapter 9 Solutions
Operations Management
Ch. 9 - Prob. 1CQCh. 9 - Prob. 2CQCh. 9 - Prob. 3CQCh. 9 - Prob. 4CQCh. 9 - Prob. 5CQCh. 9 - Prob. 6CQCh. 9 - Prob. 7CQCh. 9 - Prob. 8CQCh. 9 - Prob. 9CQCh. 9 - Prob. 10CQ
Ch. 9 - Prob. 11CQCh. 9 - Prob. 12CQCh. 9 - Prob. 13CQCh. 9 - Prob. 14CQCh. 9 - Prob. 15CQCh. 9 - Prob. 16CQCh. 9 - Prob. 17CQCh. 9 - Prob. 18CQCh. 9 - Prob. 1PACh. 9 - Prob. 2PACh. 9 - Prob. 3PACh. 9 - Prob. 4PACh. 9 - Prob. 5PACh. 9 - Prob. 6PACh. 9 - Prob. 7PACh. 9 - Prob. 8PACh. 9 - Prob. 9PACh. 9 - Prob. 10PACh. 9 - Prob. 11PACh. 9 - Prob. 12PACh. 9 - Prob. 1CCh. 9 - Prob. 2C
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
- In an article in the April 2012 issue of the Newton Conservators newsletter you can read that In the early 1970s there were approximately 40,000 trees lining the streets of Newton. Today, that number is about 26,000 - a 35% loss. The current annual rate of decline is about 650 trees per year. At this rate, if unchecked, public street trees would diminish to approximately 10,000 within a generation (25 years), and in 40 years, public street trees would no longer be part of the Newton landscape. d. Write the equation for the linear model implicit in this quotation (use years since 2012 as the independent variable). Identify the slope and the intercept, with their units.arrow_forwardDirections: For each of the following situations: a. indentify the independent variable/s b. name the dependent variable; and c. give the two attributes of each variable A study on customer's satisfaction based on the quality of food offered in fast foods.arrow_forwardIn a car manufacturing company, an automated painting process has been introduced, and the quality assurance team suspects there might be issues that require investigation. The team decides to conduct a root cause analysis to identify potential problems. Through the root cause analysis and further investigation, it appears that the drying time of the paint in minutes is affecting the overall quality of the finish. The aspect they need to examine is the variation in drying time across different colours of paint. Considering the ongoing concerns in the painting process, the team chooses to collect a sample of six drying time measurements every 20 minutes from various colours of paint. The recorded drying time values for a day's production are presented in Table 1. A total of 10 sets of measurements, each consisting of six drying time values in minutes, have been collected. Each time a set of measurements is taken, the individual drying time values are recorded. Table 1: Drying Time…arrow_forward
- Mr. Ferdinand is a well known entrepreneur who sells fresh organic beef to persons in the localcommunity. Customers love the quality of meet that Mr. Ferdinand sells so they tend torecommend his product to other persons. Recently, Mr. Ferdinand has been running out of beefto sell to his customers. One customer suggests to him that he must use past sales records toforecast demand for his beef so that he can meet his customers demand.I. Using a numerical example, demonstrate to Mr. Ferdinand how he can use a threeweek and a four-week weighted moving average to forecast demand for his beef.II. Show how Mr. Ferdinand can test the accuracy of his forecast. III. Explain to Mr. Ferdinand two ways in which he can benefit from doing forecast forhis beef.arrow_forwardA farming business needs to utilise resources effectively sparingly (efficiently). Every business scorecard needs to include Environmental Indicators so that planet related measures can be tracked and monitored. Justify why it would be beneficial for the rooibos business to implement and manage a scorecard that focuses on the following aspects of resource management: . a. Water intensity; b. Energy intensity; and c. Raw material intensityarrow_forwardMr. Ferdinand is a well-known entrepreneur who sells fresh organic beef to persons in the localcommunity. Customers love the quality of meet that Mr. Ferdinand sells so they tend torecommend his product to other people. Recently, Mr. Ferdinand has been running out of beefto sell to his customers. One customer suggests to him that he must use past sales records toforecast demand for his beef so that he can meet his customers' demand.I. Using a numerical example, demonstrate to Mr. Ferdinand how he can use a three-week and a four-week weighted moving average to forecast demand for his beef.II. Show how Mr. Ferdinand can test the accuracy of his forecast. III. Explain to Mr. Ferdinand two ways in which he can benefit from doing a forecast for his beef.arrow_forward
- ABC Limited is a manufacturing firm with a workforce of more than 100 employees. Mr Peter has recently joined the firm as the account payable clerk. Miss Emma is the accounting department head, and she is concerned about the cash disbursement system. Therefore, she has asked Mr Peter to analyse the firm's cash disbursement system and identify the internal control weaknesses from the system. Following is the description of the cash disbursement system. In the temporary file, the account payable clerk receives the supplier's invoice and reconciles it with the purchase order. The accounts payable clerk records the purchase in the purchases journal from the clerk's computer terminal and records the liability by adding a record to accounts payable subsidiary ledger. The clerk then updates the inventory control and accounts payable control accounts in the general ledger. The purchases order and invoice are later filed in the department. Each day, the clerk visually searches the accounts…arrow_forwardI need help with this practice problem A firm cleans chemical tank cars in the Bay St. Louis area. With standard equipment, the firm typically cleaned 85 chemical tank cars per month. They utilized 15 gallons of solvent, and two employees worked 20 days per month, 8 hours a day. The company decided to switch to a larger cleaning machine. Last April, they cleaned 55 tank cars, and only worked 15 days of the month. They utilized 13 gallons of solvent, and the two employees worked 6 hours a day. *type in only the values & indicate negative values by a "-" sign *round all values to 3 decimals, unless indicated otherwise (d) With the larger machine, the raw material productivity is _______ chemical tanks per gallon of solvent, and their labor productivity is ______ chemical tanks per labor hour. (e) The percentage change in material productivity is _____ %, while the percentage change in labor productivity is ________ %.arrow_forwardResidents in one housing development were asked a series of Residents in one housing development were asked a series of questions by their homeowners’ association. Identify the type of data for each question. a. Did you play golf during the last month on the development’s new golf course? b. How many times have you eaten at the country club restaurant during the last month? c. Do you own a camper? d. Rate the new security system for the development (very good, good, poor, or very poor). Residents in one housing development were asked a series ofarrow_forward
- The ABC Corporation has been engaged in the manufacture of electronic components for automobiles for the last five years. The company employees 350 employees and about 30 supervisors and managers. The increase in technology requires that employees be sent to cope with the increasing demand for updated new products consistent with the demand of local and foreign customers. The HR Manager suggested that three of the managers and eight supervisors be sent to the mother company in Japan for updates in technology on car electronics. The Vice President for Finance and the Operation Manager opposed the recommendation on the basis of cost-cutting and lack of personnel to handle the operations while they were asway for two months. They suggested that technicians from the mother company be invited instead to handle the training in the Philippines. The cost of training by the mother company would double the cost of training as they are paid higher allowances and salaries that will be charged to…arrow_forwardQuality Management System in Laboratory involves the following except: a. monitoring b. leading c. processes d. objectivesarrow_forwardA railway promises to ship freight from Toronto to Vancouver in 9 days, but customers consider any time between 6 and 14 days to be acceptable. Last week an auditor examined a sample of 71 shipments and found their delivery time had a mean of 10.4 days and a standard deviation of 1.5 days. The auditor also found 4 shipments where the customer had been charged too much money. With respect to shipping time, calculate the potential Sigma score for the process.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,
Practical Management Science
Operations Management
ISBN:9781337406659
Author:WINSTON, Wayne L.
Publisher:Cengage,
Introduction to Forecasting; Author: Ekeeda;https://www.youtube.com/watch?v=5eIbVXrJL7k;License: Standard YouTube License, CC-BY