This may apply to suppliers with the following risk characteristics: → Locations in high-risk countries → Products according to the requirements for re sponsible sourcing of minerals → Products and services with large carbon footprints → Products that fall under laws like REACh (regula tion concerning the Registration, Evaluation, Authorisation and Restriction of Chemicals) or RoHS (Restriction of the use of certain Hazardous Substances in electrical and electronic Equipment) → General aspects of supplier quality management (including sustainability-related topics) → Plant engineering (risks associated with construction contractors) To identify these risk characteristics, we categorize our suppliers according to several factors: → Purchased material and service fields are assigned to the above risk groups as part of our processes.