This Sales process diagram is a document that outlines the steps that each salesperson should take to nurture a lead from prospect to customer. A sales process involves a series of steps that allow a sales force to close more deals, increase profits, and increase sales through referrals. A sales process diagram aims to simplify this complex process by drawing some symbols and connectors. For your convenience, a simple sales process diagram is provided below. With this diagram, you can easily understand the entire process. Product knowledge is a must before embarking on the sales process. When a person is well-versed in a particular product, he has a better chance of obtaining more.