In clinical development, functional service provider (FSP) outsourcing is an outsourcing model that gives biopharmaceutical companies the flexibility to contract out full or partial aspects of a specific function or functions to a contract research organization. A range of FSP models help biopharmaceutical companies manage the ebbs and flows of portfolio workflow staffing, with customized levels of oversight, administration and governance. An FSP can range from one or two employees to teams of 50 or 100+. FSP collaborations may involve the use of either the biopharmaceutical company’s or the research organization’s systems and processes. In some cases, it may involve a mix of both.