I have a need to create a simple forecasting model to generate demand volume forecasts for a small number of product groups (~10) and a number of customer groups (~10). The forecast will be generated based on history extracted from a Sage sales order processing system. I have not found a simple enough proprietary forecasting software package that meets my need. I could build the Access database myself but it seems like a waste of time. Somebody must have done it before. Has anyone seen anything that might be suitable?