Quiz 2: Forecasting

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1

One qualitative forecasting method bases the forecast for a new product or service on the actual sales history of a similar product or service. An example is forecasting demand for the newest model of iPod by using the demand history from the previous model of iPod. This method is

life cycle analogy.

2

A qualitative forecasting method which brings experts together to jointly discuss and develop forecasts is

panel consensus forecasting.

3

​Long-term movement of demand up or down in a time series is

a trend.

4

The following table lists the number of home improvement loans approved by a finance​ company, along with the loan interest rate.

a. Develop a regression forecast model using the interest rate​ (in %) as the predictor​ (i.e., independent) variable.

The regression model is Number of loans equals 34.80 + ​(-1.54​) x interest rate. ​

b. If the interest rate is 11​%, the bank should expect to make 18 loans. ​If the interest rate is 8.5​%,

the bank should expect to make 22 loans.

5

Which of the following statements about forecasts is​ true?

Forecasts for the near term tend to be more accurate.

6

​"An estimate of the future value of some​ variable" is the definition of

a forecast.

7

​"A set of business​ processes, backed up by information​ technology, in which supply chain partners agree to mutual business objectives and​ measures, develop joint sales and operational​ plans, and collaborate to generate and update sales forecasts and replenishment​ plans" is the definition of

collaborative​ planning, forecasting, and replenishment​ (CPFR).

8

The situation is vague and little data​ exists, as in the case of new products or technologies. In this​ case, which of the following forecasting approachs is​ used?

qualitative method

9

Your manager has come to you with the following​ data, showing actual demand for five periods and forecast results for two different models. Calculate the​ MFE, MAD, and MAPE for these models.

The MFE value for the forecast Model 1 is negative 0.6. ​

The MAD value for the forecast Model 1 is 106.2.

The MAPE value for the forecast Model 1 is 32.7​%. ​

The MFE value for the forecast Model 2 is negative 26.2. ​

The MAD value for the forecast Model 2 is 105.0. ​

The MAPE value for the forecast Model 2 is 34.5​%

10

Which of the following statements about forecasts is​ true?

Forecasts for groups of products tend to be more accurate.

11

Structured questionnaires submitted to potential​ customers, often to gauge potential​ demand, are

market surveys.

12

The situation is stable and historical data​ exists, as in the case of mature products or technologies. In this​ case, which of the following forecasting approachs is​ used?

quantitative method

13

One qualitative forecasting method uses experts working individually. The individual forecasts are shared among the​ group, after which each participant is allowed to modify his or her forecast based on the shared information. This method is

Delphi.

14

A qualitative forecasting method which utilizes structured questionnaires submitted to potential customers soliciting opinions about potential products to estimate likely demand is

market surveys.

15

Which of the following statements about forecasts is​ true?

Forecasts are no substitute for calculated values.

16

Unpredictable movement of demand from one period to the next in a time series is

randomness.

17

Which of the following statements about forecasts is​ true?

Forecasts are almost always wrong.

18

Refrigerant​ R-12 was to be phased out as manufacturers switched systems to the environmentally friendly but more expensive GHG. Refrigeration repairmen consulted their forecasting models and unanimously concluded that they should stockpile​ R-12 while it was still affordable.These forecasting models could be classified as

price forecasts.

19

A qualitative forecasting method which utilizes individuals familiar with specific market​ segments, has them estimate the demand within these​ segments, and adds the forecasts together to get an overall forecast is

build-up forecasting.

20

Collaborative​ planning, forecasting, and replenishment systems perform many necessary supply chain processes. Which of the following typically does NOT fall under the scope of a CPFR​ system?

development of a layout and process choice

21

​"Asset execution, job​ scheduling, and inventory stocking are most closely assocated​ with:

Short-range forecasts

22

Which of the following statements about forecasts is​ true?

Forecasts for the near term tend to be more accurate.

23

The situation is stable and historical data​ exists, as in the case of mature products or technologies. In this​ case, which of the following forecasting approachs is​ used?

quantitative method

24

One qualitative forecasting method bases the forecast for a new product or service on the actual sales history of a similar product or service. An example is forecasting demand for the newest model of iPod by using the demand history from the previous model of iPod. This method is

life cycle analogy.

25

​"At the end of​ January, a hospital is preparing a forecast to estimate the number of patients for April. In​ January, it served 250 patients with a projected upward trend of 15 patients per month. What is the forecast patient demand in​ April?

295 patients

26

​"During te first quarter last year​ Randy's Roach Coach served 120 gallons of gumbo. Total sales for the year were 320 gallons. If Randy projects total sales of 400 gallons next​ year, what is the forecast sales during the first​ quarter?.

150 gallons

27

​"What is the basic assumption of Time Series​ forecasting?

Hstorical time series data are good predictors of the future.

28

​"Which of the following is most closely associated with the Naive or Last Period forecast​ model?

It has the highest random variation of the time series forecastintg models. This is the correct answer.

29

​"Which of the following is most closely associated with the Exponential Smoothing forecast​ model?

It is a form of a weighted moving average forecast model.

30

​"Which of the following is a provides a measure of forecast error​ dispersion?

Mean Absolute Deviation.

31

​"Prepare a trend adjusted exponential smoothing forecast for June given alpha​ = .4, beta​ = .3,  AFSubscript May ​= 1600,  FSubscript May ​= 1300, TSubscript May ​= 300, and the actual demand in May was 1500

1848

32

​"Error metrics may indicate that the forecast model is producing poor results. What action may a manager take to remidy this​ problem?

Change forecast method to better match the demand pattern.

33

​"Which of the followoing is most closely associated with data​ randomness?

unpredictable movement from one time period to the next.

34

One qualitative forecasting method uses experts working individually. The individual forecasts are shared among the​ group, after which each participant is allowed to modify his or her forecast based on the shared information. This method is

Delphi.