At Saab Training & Simulation, there are set strength requirements in the form of quality testing for its products through vibration testing. This is done to ensure the quality of the products, but the vibration machine can only test products up to a set weight limit. The purpose is to investigate the possibility of weight reduction for a fixture used in vibration testing through simulation, with the goal of testing heavier products. As part of this, the tools of topology optimization and design of experiments have been explored in an iterative process to develop design proposals. These design proposals have been evaluated through finite element analysis. The result is the development of three design proposals, out of which the proposal that advanced is presented with a weight reduction of 32,41%.