How Do You All Make Revenue Forcasts?

[adios]

Out of curiosity how do you all make revenue (sales) forcasts for a company that you invest in?

From a another thread these companys were listed as undervalued I beleive:

Altria Group
American Express
Berkshire Hathaway
Bristol-Myers Squibb

In deciding to buy one of these wouldn't one have to have some idea that the revenues for these companys were going to be better than what was forcast by the market and decide that the market was being too pessimistic? In order to determine what the "market" estimates are on revenues wouldn't one have to use the estimate of analysts? Just curious [img]/images/graemlins/smile.gif[/img].