ISO and lSO/IEC Guides and, more recently, International Standards relating generically to conformity
assessment activities such as testing, inspection and various forms of certification are prepared by working
groups of the ISO Committee on conformity assessment (CASCO). For many years, ISO/lEC Guide 2, last
revised in 1996, has included a core vocabulary for conformity assessment, built up from a small number of
terms and definitions first compiled to facilitate communication and understanding about product certification
based on standards for traditional manufactured goods.