Having a steady flow of prospects who interact with you, and hopefully become customers, promotes your company's long-term profitability. To do that, you need reliable methods for qualifying prospects. And not all of them are created equal. Before exploring how to qualify prospects, however, you need to consider the size of your market and the segments of the market you serve. For example, an auto parts manufacturer might want to focus on marketing to larger car dealers that would purchase a large volume…