Both large and small companies experience internal conflicts between the sales group and marketing group stemming from differing opinions about the role of marketing vs. the role of sales. Marketing groups tend to see sales groups as a delivery mechanism at the end of a marketing process. Sales groups tend to see marketing groups as providing a service that helps sales groups to sell more easily.

Both viewpoints depend upon perspective. If you're in marketing, it may be difficult to perceive the complexity and multiple steps involved in selling. Similarly, those in sales are so focused on "making the numbers" that it's difficult to appreciate the way that marketing has laid groundwork.