EMC testing by a certified testing facility can be costly. Should a product be found to be non-compliant, long hours can be spent trying to resolve the problem. A problem may be resolved quickly, however, while the product remains in the test facility. This can help avoid cost overruns and program delays. Certification is stringent in order to ensure proper functioning and compatibility of the product with all other electronic products. That is why it is required in order to sell the product around the world.