The Prosit project, launched in 1991, is devoted to the development of a new discrete event simulation system based on the object paradigm. Object orientation is used to ensure two main concerns: ffl performance on both conventional and multiprocessor machines ffl versatility and ease of use. In particular, Prosit user programs (models and experiment descriptions) should need only a new compilation so as to run efficiently on either a single monoprocessor workstation, a cluster of workstations or a multi-processor machine. This paper describes the design status of the project. It discusses the implementation strategies for several key aspects of the project. Rather than the model architecture that was presented and discussed in (MM93), it details the Prosit simulation environement architecture and addresses many aspects of distributed object oriented programming
