ETSI recognizes three different types of Technical Body (TB):
- Technical Committee (TC)
- ETSI Project (EP)
- ETSI Partnership Project (EPP)
ETSI may also establish Special Committees (SC) and Specification Groups (ISGs).
Each may establish Working Groups if required.
A Technical Committee is a semi-permanent entity organized around a number of standardization activities addressing a specific technology area. The results of a Technical Committee's work may often be used by other Technical Bodies.
An ETSI Project is similar to a Technical Committee but is established on the basis of a market sector requirement rather than on a basic technology, is therefore more self-contained, and has a defined duration.
An ETSI Partnership Project is an activity established when there is a need to co operate with other organizations to achieve a standardization goal and where that co operation cannot be accommodated within an ETSI Project or Technical Committee.
A Special Committee (SC) is a semi-permanent entity organized around a number of standardization activities addressing a specific technology area or related topic. Special Committees tend to handle co-ordination, requirement gathering, and very specific support activities rather drafting standards and specifications.
An Industry Specification Group (ISG) offers a very quick and easy alternative to the creation of industry forum, as it only requires a minimum of 4 ETSI Members and/or Applicant Members for foundation and adheres to the ETSI IPR Rules
The Chairman of a Technical Body is nominated by the TB and is appointed by the ETSI Board. He or she is responsible for the overall management of the TB, its working groups and its work programme.
Representatives of Full and Associate Members have the right to participate in the work of a TB and its working groups. Others may participate only under exceptional circumstances. Working documents are usually available only to members of ETSI, but the TB's output of standards and reports, once approved, is made available in the public domain, free of charge.
The ETSI Secretariat provides a range of support services to the Technical Bodies.