Postal services - Quality of service - Measurement of loss of registered mail and other types of postal service using a track and trace system; German version EN 14137:2003— 23 стр.
Postal services - Quality of service - Measurement of the transit time of end-to-end services for single piece non-priority mail and second class mail; German version EN 14508:2003+A1:2007— 14 стр.
Postal services - Quality of service - Measurement of the transit time of end-to-end services for single piece non-priority mail and second class mail; German version EN 14508:2016— 19 стр.
Postal services - Quality of service - Measurement of the transit time of end-to-end services for bulk mail; German version EN 14534:2003+A1:2007— 71 стр.