Deseasonalising & Reseasonalising
This lesson is part of the course
In this lesson
You remove the season from 2025 revenue to see the underlying level, then put the season back to forecast Q1 2026.
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Lessons in this course
- Time-Series Basics: MoM, YoY and CAGR Locked
- Moving Averages, Weighted Averages & Exponential Smoothing Locked
- Seasonality: a Seasonal Index for Every Month Locked
- Deseasonalising & Reseasonalising Locked
- Linear Trend: TREND, FORECAST.LINEAR, SLOPE & INTERCEPT Locked
- Trend × Seasonality: the 12-Month Forecast Locked
- Forecast Accuracy: MAE, MAPE, Bias & Tracking Signal Locked
- Driver-Based Scenarios vs the Statistical Forecast Locked