Every time the customers purchase electrical or electronic device proudly produced in your company and push the switch or a button, they expect the product to be reliable, and not to cause any trouble to other products or systems.
When the customer use equipment or electronic system he/she expects improvement in terms of usability, functionality of speed, but the last thing he/she wants is something to go wrong.
Electromagnetic compatibility (EMC) is defined as "the ability of a device, unit of equipment or system to function satisfactorily in its electromagnetic environment without introducing intolerable electromagnetic disturbances to anything in that environment". For that reason, the complex set of tests have to be performed for various electromagnetic phenomena before putting your product on market. EMC is not just a legal regulation, it also improves product reliability.
Most developed countries have legal regulations for electrical and electronic devices, units or systems requiring some kind of proof of electromagnetic compatibility before placing product on the market. Legal framework for electromagnetic compatibility on the "single market" of European Union is defined by the EMC Directive (2004/108/EC) and all equipment, devices or systems put on the market or into operation should meet the requirements of harmonized European Standards. The EMC Directive has been updated (2014/30/EU) and set in force since 2016.
Since January 1st 2012 the EMC Directive is mandatory in Serbia, too. It means the most of the electrical/electronic products should be tested and complied with EMC standards before placing them on Serbian market.