39 CFR §3055.45

1. (a)Single-Piece Letters/Postcards, Presorted Letters/Postcards, and Flats. For each of the Single-Piece Letters/Postcards, Presorted Letters/Postcards, and Flats products within the First-Class Mail class, report the:
   1. (1)On-time service performance (as a percentage rounded to one decimal place), disaggregated by mail subject to the overnight, 2-day, 3-day, 4-day, and 5-day service standards, as well as in the aggregate for the 3-to-5-day service standards, provided at the District, Postal Administrative Area, and National levels; and
   2. (2)Service variance (as a percentage rounded to one decimal place) for mail delivered within +1 day, +2 days, and +3 days of its applicable service standard, disaggregated by mail subject to the overnight, 2-day, 3-day, 4-day, and 5-day service standards, as well as in the aggregate for the 3-to-5-day service standards, provided at the District, Postal Administrative Area, and National levels.
2. (b)Outbound Single-Piece First-Class Mail International and Inbound Letter Post. For each of the Outbound Single-Piece First-Class Mail International and Inbound Letter Post products within the First-Class Mail class, report the:
   1. (1)On-time service performance (as a percentage rounded to one decimal place), disaggregated by mail subject to the 2-day, 3-day, 4-day, and 5-day service standards, as well as in the aggregate for the 3-to-5-day service standards and in the aggregate for all service standards combined, provided at the Postal Administrative Area and National levels; and
   2. (2)Service variance (as a percentage rounded to one decimal place) for mail delivered within +1 day, +2 days, and +3 days of its applicable service standard, disaggregated by mail subject to the overnight, 2-day, 3-day, 4-day, and 5-day service standards, as well as in the aggregate for the 3-to-5-day service standards and in the aggregate for all service standards combined, provided at the Postal Administrative Area and National levels.