Element evaluation is performed on a sample of randomly selected parts from a production lot, (if die, they are assembled into packages). These parts are then subjected to a series of tests selected to verify the reliability of the parts (Electrical, screening, environmental, endurance and mechanical tests) and the production lot from which they originated. The Element Evaluation is performed to show that the parts performance, materials and manufacturing processes are able to meet their specified electrical, mechanical and physical performance characteristics for which they were designed-and as a result, their suitability for use in the application in which they are intended to be used.