Forecasting Method 1: Percent Increase of Rolling 12 Months Over Prior Rolling Months

The system calculates the percentage increase by comparing the rolling 12 months up to 2 months prior to the month for which sales are estimated, to the prior rolling 12 months.

This forecasting method uses this calculation:

Monthly Estimate = (Previous Year's Sales for Same Month × Current Rolling 12 months) ÷ Prior Rolling 12 Months.