There is no getting away from ISO 9000 of course when discussing quality management. For the uninitiated, ISO 9000 is a family of standards developed to provide a framework around which a quality management system can be applied.
For 'quality management', you could easily read 'quality help desk management', because ISO 9000 is generic, being designed to address management in general.
Many organizations do embrace ISO 9000 to improve the quality of their help desk operations. It has a proven track record in this area, and many others. However, it is normally adopted as part of a more general thrust towards, ISO 9000, rather than solely applied to the help desk.