This certificate confirms that the ZZN experience on the Polish rail market is increasing. Certificate is the result of permanent efforts of ZZN to realize high-quality supplies for the railway industry, including the leading Polish railway companies. Obtaining the certificate was preceded by an audit. Control process had to check that organizational procedures, quality standards and technology process guarantee the top quality of the products and their suitability for rail industry. The certificate is valid for two years. In the nearest future ZZN begin deliveries to PKP INTERCITY. PKP Intercity S.A. is the largest Polish rail operator specializing in domestic and international long-distance transport. The company was established in 2001 as a result of the restructuring of Polskie Koleje Państwowe (Polish State Railways), and was in January 2008 transformed into a joint-stock company. It currently employs over 7,000 people.