A standard is a set of uniform rules that includes a catalog of requirements. These requirements may refer to products, but also to processes. The standardization combines the wishes and proposals of all relevant institutions such as manufacturers, consumer associations, lawyers, research facilities and test and certification bodies in a generally accepted work.
However, the requirements of established ISO norms and standards are often not broad enough. Because of this, official standards are supplemented by more precise house standards. Based on existing ISO norms and other recognized standards, house standards developed by TÜV Rheinland are industry and/or subject specific.
Without norms or standards, today’s movement of goods would be unthinkable since each product must be checked according to individual criteria. Standards therefore create comparability. They exist at different levels with varying ranges:
- National standards, such as the standards of the German Institute for Standardization (DIN)
- European standards, such as the EN standards of the European Union
- International standards, such as IEC and ISO standards which are recognized by a variety of nations around the world
Each standard has a scope. It describes the environment or the intended use of the standard. Therefore, many products are subject to various standards. For a coffee maker, for example, standards for safety as well as electromagnetic compatibility and hygiene apply.
Because the standards provide comparability, they form the basis of all tests which TÜV Rheinland performs. They make the test results immediately understandable. In addition, further tests of individual criteria are performed.