WASHINGTON, D.C. – The Postal Service released results of a PricewaterhouseCoopers External First-Class (EXFC) Measurement System report reflecting that First-Class Mail service destined for next-day delivery met this standard 94 percent of the time. This was the 15th consecutive quarter (Postal Quarter III, Feb. 24, 2001 through May 18, 2001) that the Postal Service has achieved at least 93 percent on-time. External First-Class Measurement System PricewaterhouseCoopers measures service performance for overnight, two-day and three-day service standard areas to provide national, area office and performance cluster estimates of service performance. This data is compared with Postal Service delivery standards and the results are presented to the public each postal quarter. Nine performance clusters or postal districts achieved scores of 96 percent, including Albuquerque, NM; Big Sky; Capital; Erie, PA; Greater Michigan; Honolulu, HI; North Florida; Van Nuys, CA and Western New York. EXFC externally measures collection box to mailbox delivery performance, continuously testing a panel of 463 ZIP Code areas selected on the basis of geographic and volume density from which 90 percent of First-Class volume originates and 80 percent destinates. EXFC is not a system-wide measurement of all First-Class Mail performance.