What method do you use for Demand forecasting?

What method do you use for Demand forecasting?

There are many types of demand forecasting methods: managerial judgment, work study method, flow models, ratio-trend method, regression analysis, Delphi technique and statistical method.

In my present organization we normally use regression analysis which is very effective method. In this method a regression graph is prepared which show the relationship between sales and workforce size. It then calculates regression line. By observing the regression line, we find out number of employees required at each volume of sales.