The seasonal variance rate represents the share of the variation of a temporal series due to the season. This corresponds to the variance of the compared component to the variance of the time series. It is rebased to 100 to know the proportion of this component over the time series.

Seasonal variance rate = variance of the season / (variance of the season + variance of the trend + variance of the residual)

For a market that have sales and the following breakdown:

We thus have a seasonal variance rate of 56%.

The seasonal variance rate can be translated into English as "Season Variance Ratio".

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