Matching between two work¯ow processes is the key step of work¯ow process reuse. This paper presents an inexact matching approach for ¯exible work¯ow process reuse. A multi-valued process specialization relationship is de®ned based on the de®nition of activity specialization and the characteristics of work¯ow process. The matching degree between two work¯ow processes is determined by the matchi...