The risk class depends on the degree of impact on the human body and directly determines the complexity and composition of the registration dossier. For both general medical devices and in vitro diagnostic products such as reagents, calibrators and test systems, the regulatory frameworks of the Russian Federation and the EAEU provide for four potential risk classes: 1, 2a, 2b and 3. Incorrect classification at the outset is one of the main reasons regulators return documents, because the risk class affects the choice of accredited laboratories and the scope of clinical testing. Resultat-Audit experts perform a detailed preliminary audit of the technical documentation to determine the correct risk class for the product.