Technology keeps improving everyday. New functionalities are added, the ones already implemented are optimized. Devices are becoming more and more complex, not only in the design and development phases, but especially in the testing one. These trends are followed by multiple categories of products. The topics discussed in this thesis are related to software systems. There are entire teams whose job it is to verify that the product meets the requirements in terms of functionality and compliance with regulations. After the testing and validation phase, the product is really close to being placed on the market. Bugs and problems found after these phases can become really problematic for the company, in terms of money and resources.