Abstract
One of the difficulties inherent to conservative parallel discrete event simulation (PDES) is the need for extraction and explicit specification of the lookahead. In this paper we propose a simulator design which allows users to build simulation models with lookahead transparently. This is based on the cooperation between PDES experts and the users, and on the reusability of model components. We introduce the principal design of the simulator and give the results related to its lookahead.