Trend × Seasonality: the 12-Month Forecast
This lesson is part of the course
In this lesson
You combine the linear trend with the seasonal indices into a monthly 2026 forecast and compare the year with 2025.
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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