https://bugs.documentfoundation.org/show_bug.cgi?id=165777

--- Comment #3 from Mike Kaganski <[email protected]> ---
Note how there's no specifics about these functions' implementation in Excel -
beyond "the AAA version of the Exponential Smoothing (ETS) algorithm" mention
in its description [1], which doesn't provide specifics (as you may see in [2],
there are different approaches for that). No idea if it's possible / realistic
to expect the same values for forecasts in different applications.

[1]
https://support.microsoft.com/en-us/office/forecast-ets-function-15389b8b-677e-4fbd-bd95-21d464333f41
[2]
https://answers.microsoft.com/en-us/msoffice/forum/all/forecastets-how-does-excel-calculate-the-alpha/2e4644f2-533f-454a-892e-bdd095bdf55b

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