Spears Rowbuck has recorded the following sales figures. Calculate the seasonal indices for Thursday and Friday. Week 1 Week 2 Week 3 Week 4 Monday 43 51 40 66.0 Tuesday 45 41 57 58.6 Wednesday 22 37 30 34.7 Thursday 25 22 33 36.7 Friday 31 25 37 25.0 a. Thursday = 29.18, Friday = 29.50 b. Thursday = 0.2074, Friday = 1.1632 c. None of the other options. d. Thursday = 0.7678, Friday = 0.7763 e. Thursday = 0.6142, Friday = 0.6211

State which forecast is best on the result for a., b., and c. forecasts. Explain your answer.

part b

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The department at a local department store has tracked the sales of a product over the last ten weeks. Forecast demand using exponential smoothing with an alpha of 0.3, and an initial forecast of 30.0 for period 1. a. Calculate the MAD covering periods 2-10. b. Calculate the tracking signal covering periods 2-10. c. What do you recommend? Period (t) Demand (At) 1 24 2 23 3 26 4 36 5 26 6 30 7 32 8 26 9 25 10 28

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Given below are the demands of a certain product over the past 10 weeks. Week | 1 2 3 4 | 5 67|89 | 10 Demand 50 64 66 68 67 63 69 67 65 66 (a) Forecast the demand for the 13th week using the following techniques: i. 3- week weighted moving average with weights 0.2, 0.3, and 0.5 ii. Exponential smoothing with a smoothing constant equal to 0.85 ii. Adjusted exponential smoothing with a smoothing constant equal to 0.85 and smoothing constant for trend equal to 0.65 (b) Compute for the accuracy of each model using the mean squared error. Based on the computed MSE, what is the best forecasting technique for this time series?

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a. A manufacturing firm manufactures electric motors. The sales during the last four months (starting from the first month) has been: 96, 75, 89, and 68 units. The forecast for the first month was 80 units. Using the exponential smoothing method with a = .70, predict the next moth's sales. Calculate the mean absolute percent deviation for this data and comment on the performance of the forecasting method. b. Using the rule lot size=multiple of 50, determine the planned order releases for each week in the following MRP record. The lead time is 2 weeks. IS