Each car scrapyard and car service has its owners, who can later add employees, granting them access to the system via a combination of mobile phone and SMS code. When a car service is in need of a specific part, they can create an advertisement for the desired part, specifying which car it is intended for. A car scrapyard that possesses the required part can then offer it for a specified amount of money. Upon making an offer, the car service receives a notification containing offer details, with the option to either accept or reject it. If the car service decides to accept the offer, the car scrapyard receives a notification instructing them where to send the appropriate part, marking the end of the exchange process.