The USPS issued its First Quarter 2017 service performance reports, which show it did not meet its targets for most mail classifications.
The Postal Service measures service performance in terms of speed and reliability. Single-Piece First-Class Mail includes letters, flats and parcels and is measured from collection box drop point to delivery. Presort First-Class Mail includes commercial mail prepared by the mailers which is sorted to the finest extent required. Single-Piece First-Class Mail International provides a measure of the domestic leg of travel for single-piece international mail.
Standard Mail is a class of mail consisting of mailable matter that is not required to be mailed as First-Class Mail or Periodicals. Service performance for Periodicals (e.g. publications) and Package Services, which includes Standard Post, Bound Printed Matter, Media Mail and Library Mail is measured from entry into the postal system to delivery.
Special Services measures those services purchased in addition to the required postage such as Registered Mail, Certified Mail, USPS Tracking, and Signature Confirmation. Other types of service such as the timeliness of Post Office Box mail “uptimes” or the electronic transmission of data such as Confirm are also included in Special Services.