Modern technologies such as VEs, Virtual Prototyping and Virtual Testing have proved to be useful tools in many fields of design and practice. For example, basic metal and parcelled goods production, electronics industry, food production, and the vehicle industry have utilised these tools to assess dependability and safety issues of products and production. In contrast to previously time consuming prototyping and testing of plans, virtual prototyping and testing can be carried out in the early stages of the design process. VE systems enable design of the product, production and work tasks, and can also be used for training and practising skills before concretising the production lines or the product itself. Virtual prototyping involves creating computer-internal, virtual prototypes of systems and processes. In particular, virtual prototypes are used to verify such properties that would decrease both the time and cost associated with product or production. Human factors and manufacturability can be evaluated without fabrication of physical prototypes.