As the demand for high-performance computing continues to rise, the ability to model and simulate parallel programs across multiprocessor architectures has become essential for system designers and developers. AXE (Architecture eXploration Environment) presents a robust simulation tool that enables detailed analysis of concurrent systems and processor configurations. This paper presents a comprehensive study on modelling parallel programs and multiprocessor architectures using AXE. We evaluate the efficiency, scalability, and synchronization characteristics of parallel applications within differentarchitectural settings. Performance metrics are examined using real and synthetic benchmarks. The results reveal AXE's potential in predicting execution behavior and guiding architectural decisions