This European Standard specifies methods for measuring the end-to-end transit time of domestic and cross-border Single Piece Priority Mail (SPPM), collected, processed and delivered by postal service operators. It considers methods using representative end-to-end samples for all types of single piece priority mail services for addressed mail with defined transit-time service levels offered to the customer. This standard is applicable to the measurement of End-to-End priority mail services.The standardized QoS-measurement method provides a uniform way for measuring the end-to-end transit time of postal items. Using a standardized measurement method will assure that the measurement will be done in an objective and equal way for all operators in accordance with the requirements of the Postal Directive 97/67/EC and its amendments.This European Standard is mandatory and mainly used for performance measurement connected to requirements of the Universal Postal Service; domestic and international (UNEX).