Pearson eText Principles of Operations Management: Sustainability and Supply Chain Management -- Instant Access (Pearson+)
11th Edition
ISBN: 9780135639221
Author: Jay Heizer, Barry Render
Publisher: PEARSON+
expand_more
expand_more
format_list_bulleted
Concept explainers
Videos
Question
Chapter 11.S, Problem 7P
a)
Summary Introduction
To determine: The variance of demand for Company WW.
Introduction:
b)
Summary Introduction
To determine: The variance of orders for Company WW.
c)
Summary Introduction
To determine: The bullwhip measure for glass bottles in Company WW.
d)
Summary Introduction
To determine: Whether Company WW exhibits amplifying or smoothing effect.
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
The following table gives the number of pints of type A blood used at Damascus Hospital in the past 6 weeks:
Week of Pints Used
August 31 360
September 7 370
September 14 412
September 21 383
September 28 371
October 5 371
a) The forecasted demand for the week of October 12 using a 3-week moving average= {__] Pints (round your response to two decimal places).
Tucson Machinery, Inc., manufactures numerically controlled machines (NCM), which sell for an average
price of $12 million each. Sales for these NCMs for the past two years were as follows:
Quantity (units)
Quantity (units)
Quarter
Last year
|||
III
IV
12
18
20
24
Quarter
This year
|
||
|||
IV
20
24
28
32
Find the equation of a simple linear regression line using Excel, in the format of Y=a+bX. Keep two decimals of a and b.
Forecast the first quarter sales for next year. Keep two decimals.
7
Chapter 11 Solutions
Pearson eText Principles of Operations Management: Sustainability and Supply Chain Management -- Instant Access (Pearson+)
Ch. 11.S - Prob. 1DQCh. 11.S - Prob. 2DQCh. 11.S - Prob. 3DQCh. 11.S - Prob. 4DQCh. 11.S - Prob. 5DQCh. 11.S - Prob. 6DQCh. 11.S - Prob. 7DQCh. 11.S - Prob. 8DQCh. 11.S - Prob. 9DQCh. 11.S - Prob. 10DQ
Ch. 11.S - Prob. 1PCh. 11.S - Prob. 2PCh. 11.S - Prob. 3PCh. 11.S - Prob. 4PCh. 11.S - Prob. 5PCh. 11.S - Prob. 6PCh. 11.S - Prob. 7PCh. 11.S - Prob. 8PCh. 11.S - Prob. 9PCh. 11.S - Prob. 10PCh. 11.S - Prob. 11PCh. 11.S - Prob. 12PCh. 11.S - Prob. 13PCh. 11.S - Prob. 14PCh. 11.S - Your options for shipping 100,000 of machine parts...Ch. 11.S - If you have a third option for the data in Problem...Ch. 11.S - Prob. 18PCh. 11.S - Prob. 19PCh. 11.S - Prob. 20PCh. 11.S - Prob. 21PCh. 11.S - Prob. 22PCh. 11 - Prob. 1EDCh. 11 - Prob. 1DQCh. 11 - Prob. 2DQCh. 11 - Prob. 3DQCh. 11 - Prob. 4DQCh. 11 - Prob. 5DQCh. 11 - Prob. 6DQCh. 11 - Prob. 7DQCh. 11 - Prob. 8DQCh. 11 - What is CPFR?Ch. 11 - Prob. 10DQCh. 11 - Prob. 11DQCh. 11 - Prob. 12DQCh. 11 - Prob. 13DQCh. 11 - Prob. 14DQCh. 11 - Prob. 15DQCh. 11 - Prob. 16DQCh. 11 - Prob. 17DQCh. 11 - Prob. 1PCh. 11 - Hau Lee Furniture, Inc., described in Example 1 of...Ch. 11 - Prob. 3PCh. 11 - Prob. 4PCh. 11 - Prob. 5PCh. 11 - Prob. 6PCh. 11 - Prob. 7PCh. 11 - Prob. 8PCh. 11 - Prob. 9PCh. 11 - Prob. 10PCh. 11 - Prob. 11PCh. 11 - Prob. 1.1VCCh. 11 - Prob. 1.2VCCh. 11 - Prob. 1.3VCCh. 11 - Prob. 1.4VCCh. 11 - Prob. 2.1VCCh. 11 - Prob. 2.2VCCh. 11 - Prob. 2.3VCCh. 11 - Prob. 3.1VCCh. 11 - Prob. 3.2VCCh. 11 - Prob. 3.3VCCh. 11 - Prob. 3.4VC
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
- The Baker Company wants to develop a budget to predict how overhead costs vary with activity levels. Management is trying to decide whether direct labor hours (DLH) or units produced is the better measure of activity for the firm. Monthly data for the preceding 24 months appear in the file P13_40.xlsx. Use regression analysis to determine which measure, DLH or Units (or both), should be used for the budget. How would the regression equation be used to obtain the budget for the firms overhead costs?arrow_forwardSuppose that a regional express delivery service company wants to estimate the cost of shipping a package (Y) as a function of cargo type, where cargo type includes the following possibilities: fragile, semifragile, and durable. Costs for 15 randomly chosen packages of approximately the same weight and same distance shipped, but of different cargo types, are provided in the file P13_16.xlsx. a. Estimate a regression equation using the given sample data, and interpret the estimated regression coefficients. b. According to the estimated regression equation, which cargo type is the most costly to ship? Which cargo type is the least costly to ship? c. How well does the estimated equation fit the given sample data? How might the fit be improved? d. Given the estimated regression equation, predict the cost of shipping a package with semifragile cargo.arrow_forwardThe file P13_22.xlsx contains total monthly U.S. retail sales data. While holding out the final six months of observations for validation purposes, use the method of moving averages with a carefully chosen span to forecast U.S. retail sales in the next year. Comment on the performance of your model. What makes this time series more challenging to forecast?arrow_forward
- The management of a technology company is trying to determine the variable that best explains the variation of employee salaries using a sample of 52 full-time employees; see the file P13_08.xlsx. Estimate simple linear regression equations to identify which of the following has the strongest linear relationship with annual salary: the employees gender, age, number of years of relevant work experience prior to employment at the company, number of years of employment at the company, or number of years of post secondary education. Provide support for your conclusion.arrow_forwardThe owner of a restaurant in Bloomington, Indiana, has recorded sales data for the past 19 years. He has also recorded data on potentially relevant variables. The data are listed in the file P13_17.xlsx. a. Estimate a simple regression equation involving annual sales (the dependent variable) and the size of the population residing within 10 miles of the restaurant (the explanatory variable). Interpret R-square for this regression. b. Add another explanatory variableannual advertising expendituresto the regression equation in part a. Estimate and interpret this expanded equation. How does the R-square value for this multiple regression equation compare to that of the simple regression equation estimated in part a? Explain any difference between the two R-square values. How can you use the adjusted R-squares for a comparison of the two equations? c. Add one more explanatory variable to the multiple regression equation estimated in part b. In particular, estimate and interpret the coefficients of a multiple regression equation that includes the previous years advertising expenditure. How does the inclusion of this third explanatory variable affect the R-square, compared to the corresponding values for the equation of part b? Explain any changes in this value. What does the adjusted R-square for the new equation tell you?arrow_forwardThe file P13_19.xlsx contains the weekly sales of a particular brand of paper towels at a supermarket for a one-year period. a. Using a span of 3, forecast the sales of this product for the next 10 weeks with the moving averages method. How well does this method with span 3 forecast the known observations in this series? b. Repeat part a with a span of 10. c. Which of these two spans appears to be more appropriate? Justify your choice.arrow_forward
- The file P13_02.xlsx contains five years of monthly data on sales (number of units sold) for a particular company. The company suspects that except for random noise, its sales are growing by a constant percentage each month and will continue to do so for at least the near future. a. Explain briefly whether the plot of the series visually supports the companys suspicion. b. By what percentage are sales increasing each month? c. What is the MAPE for the forecast model in part b? In words, what does it measure? Considering its magnitude, does the model seem to be doing a good job? d. In words, how does the model make forecasts for future months? Specifically, given the forecast value for the last month in the data set, what simple arithmetic could you use to obtain forecasts for the next few months?arrow_forwardThe file P13_28.xlsx contains monthly retail sales of U.S. liquor stores. a. Is seasonality present in these data? If so, characterize the seasonality pattern. b. Use Winters method to forecast this series with smoothing constants = = 0.1 and = 0.3. Does the forecast series seem to track the seasonal pattern well? What are your forecasts for the next 12 months?arrow_forwardThe file P13_29.xlsx contains monthly time series data for total U.S. retail sales of building materials (which includes retail sales of building materials, hardware and garden supply stores, and mobile home dealers). a. Is seasonality present in these data? If so, characterize the seasonality pattern. b. Use Winters method to forecast this series with smoothing constants = = 0.1 and = 0.3. Does the forecast series seem to track the seasonal pattern well? What are your forecasts for the next 12 months?arrow_forward
- The file P13_42.xlsx contains monthly data on consumer revolving credit (in millions of dollars) through credit unions. a. Use these data to forecast consumer revolving credit through credit unions for the next 12 months. Do it in two ways. First, fit an exponential trend to the series. Second, use Holts method with optimized smoothing constants. b. Which of these two methods appears to provide the best forecasts? Answer by comparing their MAPE values.arrow_forwardDo the sales prices of houses in a given community vary systematically with their sizes (as measured in square feet)? Answer this question by estimating a simple regression equation where the sales price of the house is the dependent variable, and the size of the house is the explanatory variable. Use the sample data given in P13_06.xlsx. Interpret your estimated equation, the associated R-square value, and the associated standard error of estimate.arrow_forwardThe file P13_25.xlsx contains the quarterly numbers of applications for home mortgage loans at a branch office of Northern Central Bank. a. Create a time series chart of the data. Based on what you see, which of the exponential smoothing models do you think will provide the best forecasting model? Why? b. Use simple exponential smoothing to forecast these data, using a smoothing constant of 0.1. c. Repeat part b, but search for the smoothing constant that makes RMSE as small as possible. Does it make much of an improvement over the model in part b? Is it guaranteed to produce better forecasts for the future?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,
Single Exponential Smoothing & Weighted Moving Average Time Series Forecasting; Author: Matt Macarty;https://www.youtube.com/watch?v=IjETktmL4Kg;License: Standard YouTube License, CC-BY
Introduction to Forecasting - with Examples; Author: Dr. Bharatendra Rai;https://www.youtube.com/watch?v=98K7AG32qv8;License: Standard Youtube License