Lights out (manufacturing)

Lights-out manufacturing is the methodology of fully automating the production of goods at factories and other industrial facilities, such as to require no human presence on-site. Many of these factories are considered to be able to run "with the lights off," but few run exclusively lights-out production. For example, in computer numerical control machining, the presence of human workers is typically required for removing completed parts and setting up tombstones that hold unfinished parts. As the technology necessary for total automation becomes increasingly available, many factories are beginning to use lights-out production between shifts (or as a separate shift) to meet increasing production demand or to save money on labor. An automatic factory is a place where raw materials enter, and finished products leave with little or no human intervention. One of the earliest descriptions of the automatic factory in fiction was the 1955 short story "Autofac," by Philip K. Dick. CNC machines do not require continuous operator attention, and some models can run unattended. A few machine shops run CNC unattended on nights and weekends. Although the machines are run without being under constant supervision, it is a common practice to always have a person in the vicinity of the machine. FANUC, a Japanese robotics company, has been operating as a lights-out factory since 2001. Robots are building other robots at a rate of about 50 per 24-hour shift and can run unsupervised for as long as 30 days at a time. "Not only is it lights-out," says Fanuc vice president Gary Zywiol, "we turn off the air conditioning and heat too." In the Netherlands, Philips uses lights-out manufacturing to produce electric razors, with 128 robots made by Adept Technology. There are only nine human quality assurance workers who oversee the end of the manufacturing process. In the manufacturing of integrated circuits using 300 mm wafers, the entire manufacturing process is completely automated, with workers only making sure that the process runs without problems and repairing any faulty machinery.