A form of outsourcing whereby services are provided by an organization that has expertise in operating a specific client function. The firm contracts with the client not just to provide and supervise staff (as in temporary staffing), but to take on full-operational responsibilities for performing the function — generally peripheral to the client’s core business — on an ongoing basis. (e.g., call center operations, IT help desk operations, food services, janitorial services, guard/security services, facilities management, lawn care services, etc.) Operations of this type may or may not be on client premises.
Source: Staffing Industry Analysts