Complex sales, also known as Enterprise sales, can refer to a method of trading sometimes used by organisations when procuring large contracts for goods and/or services where the customer takes control of the selling process by issuing a Request for Proposal (RFP) and requiring a proposal response from previously identified or interested suppliers. More commonly complex selling involves long sales cycles with multiple decision makers or an on going series of orders and deliverables over a period of time. It is about managing complex business relationships and often involves multiple stakeholders and stakeholder groups. Sales, or the activity of selling, forms an integral part of commercial activity. ... A Request For Proposal (referred to as RFP) is an invitation for suppliers, through a tender process, to bid on a specific product or service. ... A business proposal is a requirement in complex sales. ...

Products and services that are sold in this format include: CRM Solutions, commercial security, consulting engineering, training, commercial realestate, and fleet vehicle sales. Complex selling can also be used in situations where a person is selling to government or lobbying for support from multiple groups or organizations on a particular project or bid. Most big deals and mergers occur as a result of effective complex sales.