Electrical safety tests are loosely broken up into 2 separate groups, design or type tests, and routine production line tests. Design tests are usually performed for research purposes during the design phase of an electrical product. The information gathered from a design test is useful for finding potential problems with product design and development. Production line tests are usually required to be performed on 100% of the products leaving a facility for sale to consumers. A production line test helps to ensure a particular product is safe for consumer use.