Question: Please show using Excel Year Quarter Period Demand Level Trend Seasonal factors 0 Lo = ? To = ? 1 1 II 2 Si =

Please show using Excel

Please show using Excel Year Quarter Period

Year Quarter Period Demand Level Trend Seasonal factors 0 Lo = ? To = ? 1 1 II 2 Si = ? S2 = ? S3 = ? S4 = ? 3 2 4 5 6 7 8 3 III IV 1 II III IV 1 II III IV 1 II III IV 1 II III IV 225 174 241 727 351 214 346 706 412 277 255 825 549 438 431 1203 ? ? ? ? 9 10 11 12 13 14 15 16 17 18 19 20 4 Part 3: Winter's Model Now, assume the following is the demand for the past 4 years: Use the winter's method with a = 0.4, B = 0.2, y = 0.1 Obtain the initial level and trend estimates using the regression method. Obtain the initial seasonal factors using the static method. Forecast the demand for Year 5 (Period 17-20). Calculate forecast errors: MSE, MAD, and TS. 5

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