Modern manufacturing is characterised by high levels of automation and integration, complex interactions among system elements, and high capital costs. Simulation and Virtual Reality technologies hold tremendous promise for reducing costs, improving quality, process data management, enhancing control over operations and shortening the time-to-market for manufactured goods. Unfortunately, these technologies still remains largely underutilised by industry today due to the requirement for a high standard of skills in programming and modelling methodologies. Visualisation has become a critical component of simulation technology in manufacturing applications. It provides the simulation practitioners with an environment to discuss and get a better understanding of the simulation model’s behaviour. Graphical presentation and animation can be a significant tool to communicate the outcome of simulation models for the non-technical audience. Decision makers often do not have the technical knowledge to understand the statistical results of a simulation model. But when the outcome can be expressed using animation, a better level of understanding becomes possible. This thesis presents a VR-Simulator software developed entirely by the author to overcome some of the limitations of simulation packages to allow users (who are not specialists in simulation and virtual reality techniques, or have no programming skills) to develop simulation and virtual models of manufacturing systems automatically without any need for excessive training on modelling techniques or programming. The users can interact with the generated models using voice commands and virtual reality devices (e.g. HMD). The VR-Simulator can be used as an operational décision-support tool to enable decision makers to model and analyse manufacturing systems.