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Answers for “为什么在这个示例中第 2 年的预测结果是 310?”

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Understand why

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The Year 2 forecast is 310 because both the actual demand for Year 1 and the initialized forecast for Year 1 are exactly 310. When a weighted average is calculated using two identical values, the result is that same value, regardless of the weights used.

Conditions: The smoothing constant α\alpha is fixed at 0.4.; The actual demand for Year 1 (A1A_1) is 310.; The initialized forecast for Year 1 (F1F_1) is 310.

Find a method

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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.