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Answers for “视频中使用的指数平滑预测公式是什么?”

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The video presents the exponential smoothing forecast formula as a weighted average of the current actual demand and the current forecast. The next period's forecast is calculated by multiplying the current actual demand by the smoothing constant α\alpha and adding the product of the previous forecast and the complementary weight (1−α)(1-\alpha).

Conditions: The formula is used to compute the forecast for period t+1t+1.; The same smoothing constant α\alpha is used throughout the worked example.; The initial forecast F1F_1 must be specified before recursion can begin.

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The video demonstrates initializing the first forecast by setting it directly equal to the first period's actual demand. Because there is no prior forecast available to use in the recursive formula, the observed actual demand for period 1 is placed straight into the forecast column as F1F_1.

Conditions: Used when no prior forecast is available.; Applied specifically to period 1 in this example.; After initialization, later forecasts are generated recursively starting from period 2.