[Methods of risk assessment and their validation].

The review of the literature data shows several methods for the the risks assessment of biomnechanical overload of the musculoskeletal system in activities with repetitive strain of the upper limbs and manual material handling. The application of these methods should allow the quantification ofriskfor the working population, the identification of the preventive measures to reduce the risk and their effectiveness and thle design of a specific health surveillance scheme. In this paper we analyze the factors which must be taken into account in Occupational Medicine to implement a process of validation of these methods. In conclusion we believe it will necessary in the future the availability of new methods able to analyze and reduce the risk already in the design phase of the production process.