The greatest obstacle to success in the design of a device is that, often times, the design engineer overlooks the need to keep electromagnetic interference in mind when he designs his device. When a product is not in compliance, it can be interfered with by radio waves emitting from other electronic devices in the home, causing the product to malfunction. Also, the waves his product emits can interfere with other medical devices being used, causing them to malfunction. To avoid this interference between devices, the design engineer’s finished product must pass a regulatory compliance test. If it fails this test, the design engineer will find it costly and time consuming to redesign his product or to add fixes to bring it into compliance.