"The EU harmonized standard" means the CEN, CENELEC and ETSI the European Commission in consultation with Member States to develop and approve orders issued by the implementation of European standards. Since 1999, the European Commission to the European standardization bodies of 26 under the standard power of attorney, including 13 on the New Approach Directives. CEN, CENELEC and ETSI to develop "harmonized standards" of the process is transparent and based on the views of all stakeholders on a consistent basis. According to the European Standardization Organization, member states need to coordinate standards into national standards, and to remove the contrary to the national standards harmonized standards, this provision is mandatory. Coordination of standards and codes must be the title of the Official Journal published in the EC, and indicate a new method with the corresponding instructions. As long as the manufacturer's product line with the Official Gazette, and has been translated into national standards harmonized standards, it is presumed that the product meets the appropriate essential requirements of EU directives. Coordinate the implementation of standards based on force, manufacturers must follow the coordination of standards for testing.

According to EU statistics site, the end of 2002, by the CEN, CENELEC and ETSI the three European standards organizations have developed standards for the coordination of more than 2,000. Such as: Low Voltage Directive (Directive 73/23/EEC) concerning the coordination of more than 600 standards, the Construction Products Directive (Directive 89/106/EEC) the coordination of standards involving more than 50 machinery safety directive (Directive98/37 / EC) standards related to the coordination of more than 400 EMC Directive (Directive89/336/EEC) the coordination of standards involving more than 90 Medical Device Directive (Directive 93/42/EEC) the coordination of standards involving more than 200 Gas Equipment Directive (Directive 90/396/EEC) concerning the coordination of standards 95, radio communications and Telecommunications Terminal Equipment Directive (99/5/EC) the coordination of standards involving more than 180.

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