Definition
ARIMA
A family of statistical time-series models using autoregression, differencing, and moving-average errors to forecast future values.
Why it matters
The practical consequence.
ARIMA models are interpretable, fast, and often strong baselines for mature time series with stable historical structure.
Example
How it appears in a system.
A retailer can compare an ARIMA forecast with seasonal-naive and promotion-aware models before choosing a production approach.
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