3.4.17 WeldingWelding work on the tool shall be carried out according to manufacturing specification B2 0501.001(process management, welding material, welding process), especially due to possible subsequentheat and surface treatments.Requirements Specification, Metal Forming Technology (TU) 2019 DID-DE-0203584 Page 55 of 60The position and the process parameters of each welding performed shall be documented with a signaccording to the manufacturing specification on the tool. Additionally, the welding shall be describedon a BMW AG documentation form.There shall be no welding work on active surfaces of body shell parts. Exceptions require writtenapproval by the client.