  This paper proposes the use of model-checking software technology for the
verification of workflows and business processes behaviour based on web
services, namely the use of the SPIN model checker. Since the specification of
a business process behaviour based on web services can be decomposed into
patterns, it is proposed a translation of a well known collection of workflow
patterns into PROMELA, the input specification language of SPIN. The use of
this translation is illustrated with one business process example, which
demonstrates how its translation to a PROMELA model can be useful in the web
service specification and verification.
