Principles of Operations Management: Sustainability and Supply Chain Management (10th Edition)
10th Edition
ISBN: 9780134181981
Author: Jay Heizer, Barry Render, Chuck Munson
Publisher: PEARSON
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Textbook Question
Chapter 4, Problem 2.4VC
Name several variables besides those mentioned in the case that could be used as good predictors of daily sales in each cafe.
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1. The number of bushels of apples sold at a roadside fruit stand over a 12-day period were
as follows:
Day
Numbar Sold Day Number Sold
25
35
31
8.
32
29
9.
10
38
33
34
37
40
37
32
11
12
If a two-period moving average has been used to forecast sales, what were the daily
forecasts starting with the forecast for day 3?
If a four-period moving average has been used, what were the forecasts for eacn uay
starting with day 5?
Plot the original data and each set of forecasts on the same graph. Which forecast
has the greater tendency to smooth? Which forecast has the better ability to respond
quickly to changes?
What does use of the term sales instead of demand imply?
a.
b.
C.
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Chapter 4 Solutions
Principles of Operations Management: Sustainability and Supply Chain Management (10th Edition)
Ch. 4 - Ethical Dilemma We live in a society obsessed with...Ch. 4 - What is a qualitative forecasting model, and when...Ch. 4 - Identify and briefly describe the two general...Ch. 4 - Identify the three forecasting time horizons....Ch. 4 - Briefly describe the steps that are used to...Ch. 4 - A skeptical manager asks what medium-range...Ch. 4 - Explain why such forecasting devices as moving...Ch. 4 - What is the basic difference between a weighted...Ch. 4 - What three methods are used to determine the...Ch. 4 - Research and briefly describe the Delphi...
Ch. 4 - What is the primary difference between a...Ch. 4 - Define time series.Ch. 4 - What effect does the value of the smoothing...Ch. 4 - Explain the value of seasonal indices in...Ch. 4 - Prob. 14DQCh. 4 - In your own words, explain adaptive forecasting.Ch. 4 - Prob. 16DQCh. 4 - Explain, in your own words, the meaning of the...Ch. 4 - Prob. 18DQCh. 4 - Give examples of industries that are affected by...Ch. 4 - Prob. 20DQCh. 4 - Prob. 21DQCh. 4 - CEO John Goodale, at Southern Illinois Power and...Ch. 4 - The following gives the number of pints of type B...Ch. 4 - a) Plot the above data on a graph. Do you observe...Ch. 4 - Refer to Problem 4.2. Develop a forecast for years...Ch. 4 - A check-processing center uses exponential...Ch. 4 - The Carbondale Hospital is considering the...Ch. 4 - The monthly sales for Yazici Batteries, Inc., were...Ch. 4 - The actual demand for the patients at Omaha...Ch. 4 - Daily high temperatures in St. Louis for the last...Ch. 4 - Lenovo uses the ZX-81 chip in some of its laptop...Ch. 4 - Data collected on the yearly registrations for a...Ch. 4 - Use exponential smoothing with a smoothing...Ch. 4 - Prob. 12PCh. 4 - At you can see in the following table, demand for...Ch. 4 - Prob. 14PCh. 4 - Refer to Solved Problem 4.1 on page 144. a) Use a...Ch. 4 - Prob. 16PCh. 4 - Prob. 17PCh. 4 - Prob. 18PCh. 4 - Income at the architectural firm Spraggins and...Ch. 4 - Resolve Problem 4.19 with = .1 and =.8. Using...Ch. 4 - Prob. 21PCh. 4 - Refer to Problem 4.21. Complete the trend-adjusted...Ch. 4 - Prob. 23PCh. 4 - The following gives the number of accidents that...Ch. 4 - In the past, Peter Kelles tire dealership in Baton...Ch. 4 - George Kyparisis owns a company that manufactures...Ch. 4 - Attendance at Orlandos newest Disneylike...Ch. 4 - Prob. 28PCh. 4 - The number of disk drives (in millions) made at a...Ch. 4 - Prob. 30PCh. 4 - Emergency calls to the 911 system of Durham, North...Ch. 4 - Using the 911 call data in Problem 4.31, forecast...Ch. 4 - Storrs Cycles has just started selling the new...Ch. 4 - Boulanger Savings and Loan is proud of its long...Ch. 4 - Mark Gershon, owner of a musical instrument...Ch. 4 - Prob. 44PCh. 4 - Cafe Michigans manager, Gary Stark, suspects that...Ch. 4 - Prob. 46PCh. 4 - The number of auto accidents in Athens, Ohio, is...Ch. 4 - Rhonda Clark, a Slippery Rock, Pennsylvania, real...Ch. 4 - Accountants at the Tucson firm, Larry Youdelman,...Ch. 4 - Prob. 50PCh. 4 - Using the data in Problem 4.30, apply linear...Ch. 4 - Bus and subway ridership for the summer months in...Ch. 4 - Prob. 53PCh. 4 - Dave Fletcher, the general manager of North...Ch. 4 - Sales of tablet computers at Ted Glickmans...Ch. 4 - The following are monthly actual and forecast...Ch. 4 - Develop a forecasting model, justifying its...Ch. 4 - Prob. 2CSCh. 4 - Discuss the schools options.Ch. 4 - Prob. 1.1VCCh. 4 - Prob. 1.2VCCh. 4 - Using Perezs multiple-regression model, what would...Ch. 4 - Prob. 1.4VCCh. 4 - Describe three different forecasting applications...Ch. 4 - What is the role of the POS system in forecasting...Ch. 4 - Justify the use of the weighting system used for...Ch. 4 - Name several variables besides those mentioned in...Ch. 4 - Prob. 2.5VC
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- 1. The number of bushels of apples sold at a roadside fruit stand over a 12-day period were PROBLEMS as follows: Day Numbar Sold Day Number Sold 25 35 31 29 33 32 38 10 40 37 32 34 11 37 12 If a two-period moving average has been used to forecast sales, what were the daily forecasts starting with the forecast for day 3? If a four-period moving average has been used, what were the forecasts for eacn uay starting with day 5? Plot the original data and each set of forecasts on the same graph. Which forecast has the greater tendency to smooth? Which forecast has the better ability to respond quickly to changes? What does use of the term sales instead of demand imply? b. C. 2. If exponential smoothing with a = .4 had been used to forecast daily sales for apples in Problem 1, determine what the daily forecasts would have been. Then, plot the original data, the exponential forecasts, and a set of naive forecasts on the same graph. Based on a visual comparison, is the naive more accurate or…arrow_forwardThere are two general methods to forecasting:Even, what is their meaning?arrow_forwardWhat forecasting technique makes use of written surveys or telephone interviews? Historical analogy, Delphi method, Marketing research, Ad hoc forecasting, or Collaborative forecasting? 2 Which qualitative forecasting technique was developed to ensure that the input from every participant in the process is weighted equally? Historical analogy, Delphi method, Marketing research, Ad hoc forecasting, or Collaborative forecasting? 3 When forecasting demand for new products, sometimes firms will use demand data from similar existing products to help forecast demand for the new product. What technique is this an example of? Historical analogy, Delphi method, Marketing research, Ad hoc forecasting, or Collaborative forecastingarrow_forward
- - The number of bushels of apples sold at a roadside fruit stand over 12-day period were as follows: 7 8 9 33 34 37 35 55 32 38 Day 1 2 3 4 5 No. 25 31 29 29 Sold 10 10 11 12 40 40 37 37 32 22 a. If a three-day moving average has been used to forecast sales, what were the daily forecasts starting with the forecast for day 10? b. If a five-period moving average has been used, what were the forecasts for each day starting with day 13? c. If the exponential smoothing with a = 0.4 has been used to forecast daily sales for apples, determine what the daily forecasts would have been. Then plot the original data, the exponential forecasts, and a set of naïve forecasts on the same graph. Based on the visual comparison, is the naïve more accurate or less accurate than the exponential smoothing method, or are they about the same?arrow_forwardDo you have any models for forecasting?arrow_forwardCompany XYZ is a movie distribution company. It has kept records of total annual movie ticket sales for one community over last 4 years: Actual Sale 2015 96,480 94,300 97,800 92,100 2016 2017 2018 You used the moving average method to forecast 2018 sale using 2015, 2016 and 2017 information. And then you used the exponential smoothing model to forecast 2019 sale based on 2018 information, using alpha = 0.3. What is the forecasted 2019 sale? 8:42 pmarrow_forward
- State what is a qualitative forecasting model and it uses under forecasting ?arrow_forwardSuppose that the Perpetual Help College of Rizal had the following record of its growth of enrollment from 2011 -2020. Year Enrolment Year Enrolment 2011 5,200 2016 7,000 2012 5,500 2017 8,800 2013 6,000 2018 9,400 2014 6,500 2019 9,600 2015 6,800 2020 10,500 a) Develop a forecast of enrolment beginning 2014 to 2021 using 3-years moving average forecast model. b) Using weights of .50 for the most recent data, .30 to the second recent data, and .20 to the 3 months old data, develop a forecast beginning 2014 to 2021 using 3 years weighted moving average forecast…arrow_forwardDescribe the various types of time-series and associative forecasting models. Which types of organizations are each of these most applicable to, and why?arrow_forward
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