This article examined the features of the DEVS-Scheme environment, inc
luding its underlying object-oriented foundation, the DEVS formalism,
modelling and simulation constructs, and knowledge representation sche
me. Some future research issues were also discussed. The object-orient
ed simulation environment supports building discrete event models in a
hierarchical, modular manner which is more difficult in conventional
simulation languages. Its application domains include flexible manufac
turing systems, computer networks, autonomous laboratory robots, and g
roup decision support systems.