A B C D E F G H I J K L M N O P Q R S T U
Template for Exponential-Smoothing with Trend Forecasting Method with Seasonality
Seasonally Seasonally Range Name Cells
True Adjusted Latest Estimated Adjusted Actual Forecasting Smoothing Constant ActualForecast I6:I35
Year Month Value Value Trend Trend Forecast Forecast Error a = 0.2 Alpha M5
1 Jan 68 76 080 72 4b = 0.2 Beta M6
1 Feb 71 81 -1 079 69 2 ForecastingError J6:J35
1 Mar 66 73 0 0 79 72 6Initial Estimate InitialEstimateAverage M9
1 Apr 72 77 -1 077 72 0 Average = 80 InitialEstimateTrend M10
1 May 77 80 0 0 77 74 3 Trend = 0 MAD M30
1 June 85 78 0 0 77 84 1 MSE M33
1 July 94 80 0 0 77 90 4Type of Seasonality SeasonalFactor M16:M27
1 Aug 96 83 0 0 78 89 7 Monthly SeasonallyAdjustedForecast H6:H35
1 Sep 80 82 1 0 79 77 3 SeasonallyAdjustedValue E6:E35
1 Oct 73 80 1 0 80 73 0Month Seasonal Factor TrueValue D6:D35
1 Nov 84 80 0 0 80 84 0 Jan 0.90 TypeOfSeasonality M13
1 Dec 89 82 0 0 80 87 2 Feb 0.88
2 Jan 75 83 1 0 81 73 2 Mar 0.91
2 Feb 76 86 1 0 82 72 4 Apr 0.93
2 Mar 81 89 1 1 83 76 5 May 0.96
2 Apr 84 90 2 1 85 79 5 June 1.09
2 May 85 89 2 1 87 84 1 July 1.17
2 June 99 91 1 1 89 97 2 Aug 1.15
2 July 107 91 1 1 90 106 1 Sep 0.97
2 Aug 108 94 1 1 92 105 3 Oct 0.91
2 Sep 94 97 2 1 93 91 3 Nov 1.05
2 Oct 90 99 2 1 96 87 3 Dec 1.08
2 Nov 106 101 2 2 98 103 3
2 Dec 110 102 2 2 100 108 2Mean Absolute Deviation
3 Jan #N/A 2 2 102 92 MAD = 2.74
3 Mar #N/A #N/A Mean Square Error
3 Apr #N/A #N/A MSE = 10.44
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Seasonally-Adjusted Value
Time Period
Seasonally Adjusted Value
Seasonally Adjusted
Forecast