Monday, August 31, 2015
“Mail destinating in FSS zones . . . that had previously qualified for Standard Mail Carrier Route rates migrated to FSS rates in the Standard Mail Flats product,” the USPS explained. Translation: What had been called Standard Flats hasn’t become more efficient; it’s just that the definition of Standard Flats has been broadened to include lower-cost mail that is sorted on the huge FSS machines.
Because of the FSS change, “roughly 20 percent of Standard Mail Carrier Route flats shifted into the Standard Mail Flats product,” the USPS wrote. “The migrated mail would tend to have different cost causing characteristics than the existing Standard Mail Flats, as the migrated Standard Mail Carrier Route mail tends to come from higher density mailings with more finely presorted containers.”