Complex sales, also known as Enterprise sales, can refer to a method of trading sometimes used by organizations 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. Complex sales involve long sales cycles with multiple decision makers. Multiple stakeholders and stakeholder groups contribute to every complex sale. These types of sales can take up to 8 to 18 months as multiple people from higher management are involved.[1]