How does Excel calculate the Alpha, Beta, Gamma parameters in the AAA-ETS algorithm?

Question

FORECAST.ETS and other .ETS functions uses an AAA version of the Exponential Smoothing (ETS) algorithm. I have not found mentioning what specific parameters are used in these functions and the result in them differs from the results in the same functions in other editors (LO for example with the same data). Is there a link explaining what value is used in the forecast under the hood?

Answer 1

Hi @demosfen

Sorry, I do not find any Microsoft documents that describe the specific calculation formula or optimization algorithm of the parameters in detail.

Excel formula calculation has a high degree of automation, it is difficult for us to directly obtain the exact values ​​of α, β, and γ parameters, which involves the development of Excel.

Thanks for your understanding.

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