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Harmon Foods (A) Sales Forecasting Models Managerial Problem Harmons management needs an accurate forecast of sales for Treat Cereal in order to efficiently manage production

Harmon Foods (A)

Sales Forecasting Models

Managerial Problem

Harmons management needs an accurate forecast of sales for Treat Cereal in order to efficiently manage production and inventory. Seriously underestimating demand could cause stock outs, poor customer relations and a loss of profitable business. Overestimating demand could create costly over production of Treat cereal.

A strong model will forecast sales with sufficient accuracy to aid management in planning. In short, your goal is to develop a model that minimizes forecasting error.

Modeling Challenge

1. Calibrate at least two forecasting models. Model 1 should forecast quarterly sales using two predictor variables, seasonality and a linear trend. This model is simple, easy to estimate and to apply. Model 2, a more complex multiple regression model, should use any combination of predictor variables that help to accurately forecast quarterly sales.

2. Evaluate the predictive power of each model. Does either model forecast sales with sufficient precision to help in the planning process? Examine several statistical measures of forecasting accuracy.

3. Write a recommendation for management.

Harmon Foods (B)

Evaluating the Impact of Promotions on Sales Volume

Managerial Problem

Harmons management spends heavily to promote Treat cereal. However, they do not fully understand the impact of promotional spending on sales. Management wants to evaluate the effectiveness of promotional spending. They are particularly interested in three questions:

- How do promotions impact sales?

- Is promotional spending profitable?

- On the margin, which type of promotion (trade or consumer) is most effective? That is, if management had extra funding for promotions, how should they spend it?

Modeling Challenge

1. MODEL. Present and discuss at least one regression model demonstrating the impact of promotions on sales. Your model should highlight:

- lagged promotion variables

- the net impact of a promotion on sales

2. EXHIBIT. Design at least one clear exhibit summarizing your model. Ideally, the exhibit will present coefficients (with measures of significance) and a measure of the net effect of each promotion. An exhibit requires an explanatory title and clear labeling.

3. MODEL FIT. Briefly assess the overall fit/validity of the model. This could be accomplished with one short paragraph, which might include a mix of the following: R-square, standard error of the estimate, significance of estimated coefficients, face validity of model.

4. PROFIT IMPACT. Compare the profit impact of the promotions. Any method of assessing profit impact is OK, as long as it would be understandable to management.

5. MANAGERIAL FINDINGS. Clearly and succinctly explain your managerial findings.

Data:

Case Consumer Dealer Index
YEAR MONTH Shipments Packs Allowance Season Trend
1983 Oct na 0 224,028
1983 Nov na 0 304,004
1983 Dec na 0 352,872
1984 Jan 425,075 75,253 457,732 113 1
1984 Feb 315,305 15,036 254,396 98 2
1984 Mar 367,286 134,440 259,952 102 3
1984 Apr 429,432 119,740 267,368 107 4
1984 May 347,874 135,590 158,504 119 5
1984 Jun 435,529 189,636 430,012 104 6
1984 Jul 299,403 9,308 388,516 107 7
1984 Aug 296,505 41,099 225,616 81 8
1984 Sep 426,701 9,391 1,042,304 113 9
1984 Oct 329,722 942 974,092 97 10
1984 Nov 281,783 1,818 301,892 95 11
1984 Dec 166,391 672 76,148 65 12
1985 Jan 629,404 548,704 0 113 13
1985 Feb 263,467 52,819 315,196 98 14
1985 Mar 398,320 2,793 703,624 102 15
1985 Apr 376,569 27,749 198,464 107 16
1985 May 444,404 21,887 478,880 119 17
1985 Jun 386,986 1,110 457,172 104 18
1985 Jul 414,314 436 709,480 107 19
1985 Aug 253,493 1,407 45,380 81 20
1985 Sep 484,365 376,650 28,080 113 21
1985 Oct 305,989 122,906 111,520 97 22
1985 Nov 315,407 15,138 267,200 95 23
1985 Dec 182,784 5,532 354,304 65 24
1986 Jan 655,748 544,807 664,712 113 25
1986 Feb 270,483 43,704 536,824 98 26
1986 Mar 365,058 5,740 551,560 102 27
1986 Apr 313,135 9,614 150,080 107 28
1986 May 528,210 1,507 580,800 119 29
1986 Jun 379,856 13,620 435,080 104 30
1986 Jul 472,058 101,179 361,144 107 31
1986 Aug 254,516 80,309 97,844 81 32
1986 Sep 551,354 335,768 30,372 113 33
1986 Oct 335,826 91,710 150,324 97 34
1986 Nov 320,408 9,856 293,044 95 35
1986 Dec 276,901 107,172 162,788 65 36
1987 Jan 455,136 299,781 32,532 113 37
1987 Feb 247,570 21,218 23,468 98 38
1987 Mar 622,204 157 4,503,456 102 39
1987 Apr 429,331 12,961 500,904 107 40
1987 May 453,156 333,529 0 119 41
1987 Jun 320,103 178,105 0 104 42
1987 Jul 451,779 315,564 46,104 107 43
1987 Aug 249,482 80,206 92,252 81 44
1987 Sep 744,583 5,940 4,869,592 113 45
1987 Oct 421,186 36,819 376,556 97 46
1987 Nov 397,367 234,562 376,556 95 47
1987 Dec 269,096 71,881 552,536 65 48

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