A standard developed by the International Organization for Standardization that specifies requirements for a quality management system where an organization needs to demonstrate its ability to provide product consistently that meets customer and applicable regulatory requirements, and aims to enhance customer satisfaction through the effective application of the system, including processes for continual improvement of the system and the assurance of conformity to customer and applicable regulatory requirements. A number of staffing companies have ISO accreditation, especially those that provide software such as VMS or ATS as part of their service offering as evidence of the quality of their systems. Some vendors also have ISO 27001:2005 accreditation, which specifies the requirements for establishing, implementing, operating, monitoring, reviewing, maintaining and improving a documented information security management system.