What are some ways to forecast a company's future sales?

what product can you buy with 250 dollars ? What product did you buy? What prompted you to believe you needed the product? How did you initially research the product? Did you look at product reviews? Where did you find the reviews? What sentiments in the review influenced you? What thoughts went through your head when deciding what alternatives to research—or whether to research at all? What were some of your purchase criteria? What did you base your evaluation on? What are some other potential influences that affected which product you ultimately purchased? Friends and family? Past behavior? What do you know about the brand? How satisfied were you with the purchase? Would you make the same purchase again? Why or why not?  Would you post a review about the product? Where would you post it?

In order for a market to exisit, there must be a need for a product, ability to pay, willing to buy, authority to buy, and be a group large enough to result in a profit. Without these, you do not have a viable market. What are some things a person can do to prevent not having a viable market?

What arer the implementation of tools for measuring business success?