Supply Chain

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  • Topic: Time series analysis, Moving average, Time series
  • Pages : 7 (1639 words )
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  • Published : May 16, 2013
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Chapter 4: Multiple Choice Questions 1. Forecasts a. become more accurate with longer time horizons b. are rarely perfect c. are more accurate for individual items than for groups of items d. all of the above e. none of the above One purpose of short-range forecasts is to determine a. production planning b. inventory budgets c. research and development plans d. facility location e. job assignments Forecasts are usually classified by time horizon into three categories a. short-range, medium-range, and long-range b. finance/accounting, marketing, and operations c. strategic, tactical, and operational d. exponential smoothing, regression, and time series e. departmental, organizational, and industrial A forecast with a time horizon of about 3 months to 3 years is typically called a a. long-range forecast b. medium-range forecast c. short-range forecast d. weather forecast e. strategic forecast Forecasts used for new product planning, capital expenditures, facility location or expansion, and R&D typically utilize a a. short-range time horizon b. medium-range time horizon c. long-range time horizon d. naive method, because there is no data history e. all of the above The three major types of forecasts used by business organizations are a. strategic, tactical, and operational b. economic, technological, and demand c. exponential smoothing, Delphi, and regression d. causal, time-series, and seasonal e. departmental, organizational, and territorial Which of the following is not a step in the forecasting process? a. determine the use of the forecast b. eliminate any assumptions c. determine the time horizon d. select a forecasting model(s) e. validate and implement the results

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The two general approaches to forecasting are a. qualitative and quantitative b. mathematical and statistical c. judgmental and qualitative d. historical and associative e. judgmental and associative Which of the following uses three types of participants: decision makers, staff personnel, and respondents? a. executive opinions b. sales force composites c. the Delphi method d. consumer surveys e. time series analysis Which of the following is not a type of qualitative forecasting? a. executive opinions b. sales force composites c. consumer surveys d. the Delphi method e. moving average The forecasting model that pools the opinions of a group of experts or managers is known as the a. sales force composition model b. multiple regression c. jury of executive opinion model d. consumer market survey model e. management coefficients model Which of the following techniques uses variables such as price and promotional expenditures, which are related to product demand, to predict demand? a. associative models b. exponential smoothing c. weighted moving average d. simple moving average e. time series Which of the following statements about time-series forecasting is true? a. It is based on the assumption that future demand will be the same as past demand. b. It makes extensive use of the data collected in the qualitative approach. c. The analysis of past demand helps predict future demand. d. Because it accounts for trends, cycles, and seasonal patterns, it is more powerful than causal forecasting. Time-series data may exhibit which of the following behaviors? a. trend b. random variations c. seasonality d. cycles e. all of the above

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Gradual, long-term movement in time-series data is called a. seasonal variation b. cycles c. trends d. exponential variation e. random variation Which of the following is not present in a time series? a. seasonality b. operational variations c. trend d. cycles e. random variations The fundamental difference between cycles and seasonality is the a. duration of the repeating patterns b. magnitude of the variation c. ability to attribute the pattern to a cause d. all of the above In time series, which of the following cannot be...
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