VMS (Vendor Management System) evolved from the Staffing model Vendor-On-Premises (VOP) concept, featuring a recruiter on-site working with one firm to fill contractor roles. VOP was very popular in the late-1980s thru mid-1990s, when large clients expressed dissatisfaction with the VOP and looked for a new way to reduce contingent labor costs. Next... The Birth of VMS... Circa: 1995