Marketing and sales differ greatly, but have the same goal. Selling is the final stage in Marketing, which also includes Pricing, Promotion, Place and Product. A marketing department in an organization has the goals of increasing the desirability and value to the customer and increasing the number and engagement of interactions between potential customers and the organization. The field of sales process engineering views "sales" as the output of a larger system, not just as the output of one department. The larger system includes many functional areas within an organization. From this perspective, "sales" and "marketing" label for a number of processes whose inputs and outputs supply one another to varying degrees.
The sales department would aim to improve the interaction between the customer and the sales facility or mechanism and/or salesperson. Sales management would break down the selling process and then increase the effectiveness of the discrete processes as well as the interaction between processes. Each step of the process has sales-related issues, skills, and training needs, as well as marketing solutions to improve each discrete step, as well as the whole process.