Special machinery businesses design, manufacture and supply equipment built for a particular industrial process, product or operating environment. Unlike standard, off-the-shelf machines, these systems are configured around a customer's production requirements and may combine mechanical, electrical and control components. Examples include bespoke production and assembly machines, material handling equipment, testing rigs, packaging systems and machinery for processing or inspection. Services can include assessing requirements, preparing designs, building prototypes, installing and commissioning equipment, and integrating new machinery with existing production lines. Businesses may also provide operator training, safety features, documentation, maintenance, repairs, spare parts and upgrades. The work can involve adapting existing machines as well as creating complete systems, with specifications covering factors such as output, accuracy, materials handled and the working environment.