Object oriented models model structural and behavioural aspects of obj
ects in the Universe of Discourse. As the dynamic aspects of objects i
nclude parallelism and synchronisation of object life cycles, conceptu
al schemes must be verified for problematic behaviour like deadlock. I
n this paper we will present fragments of a method for object oriented
analysis and the process algebra that allows to formally verify a con
ceptual schema build according to this method for deadlock behaviour.