In considering whether the supplier should carry out the verification, the manufacturer should take into
account the results of the evaluation carried out under 7.4.1. The decision should reflect the competence of
the supplier, including whether they have a quality system that covers the activity, the resources, e.g.
equipment, and personnel with sufficient skill and experience to do the job. This latter point is particularly
significant when judgement is required, such as when inspecting a flameproof casting. When the manufacturer
elects to have the supplier carry out tests or inspections relevant to the type of protection, the product should
be supplied with a declaration of conformity according to ISO/IEC 17050-1 that confirms it has been done.