Published by Joannes Vermorel at https://blog.lokad.com/journal/2008/6/18/forecasting-methods-for-excel.html
Lokad delivers an advance forecasting technology, but for those who may just needing simple stuff, we have published a short guide about forecasting in Excel.
It is meant to be as simple as possible, and show what can be done with Excel in terms of forecasting - using linear regression or exponential fitting, through trendlines or the excel analysis toolpack (ATP).
It should allow small businesses, retailers or manufacturers, to easily perform a basic forecast of sales and demand.
It also gives useful advices about how to optimally use Excel, use comments and name your files and worksheets.