Here is an ArchiMate diagram example.
The ArchiSurance Contact Center, modeled as a business actor, is composed of three employees, also modeled as business actors: Greg, Joan, and Larry. The Contact Center has three business interfaces to serve customers: Phone, E-mail, and Web Chat. Greg fulfills the business role of Travel Insurance Claim Analyst, Joan fulfills the business role of Home Insurance Product Specialist, and Larry fulfills the business role of Customer Service Representative. The former two business roles are specializations of a business role Specialist. High-Risk Claims Adjudication is a business collaboration of two business roles: Specialist and Customer Service Representative.