Time Series
Observations indexed by time, where the sequence itself is data. Trend, seasonality, cycles and noise — and the distinction most summaries get wrong.
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Windows (in Time-Series)
The rolling alarm fires on three days and stays quiet on seventy-four while the latency stays 40 ms high the whole time.
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Prophet Forecasting
Prophet offers configurable forecasting at scale. Two FPP3 examples favor other methods on accuracy; assess its performance on your own series and forecast horizon.
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Seasonal Lag
The value from the same season one period ago. Where it appears in the ACF, what seasonal differencing does with it, and why it is expensive in data.
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Seasonality
A repeating pattern tied to the calendar. What separates it from a cycle, and why confusing the two produces forecasts the data never supported.