Katana VentraIP

Assembly line

An assembly line is a manufacturing process (often called a progressive assembly) in which parts (usually interchangeable parts) are added as the semi-finished assembly moves from workstation to workstation where the parts are added in sequence until the final assembly is produced. By mechanically moving the parts to the assembly work and moving the semi-finished assembly from work station to work station, a finished product can be assembled faster and with less labor than by having workers carry parts to a stationary piece for assembly.

For the video game company, see The Assembly Line.

Assembly lines are common methods of assembling complex items such as automobiles and other transportation equipment, household appliances and electronic goods.


Workers in charge of the works of assembly line are called assemblers.[1]

Workers do not do any heavy lifting.

No stooping or bending over.

No special training was required.

There are jobs that almost anyone can do.

Provided employment to immigrants.

In his 1922 autobiography,[2] Henry Ford mentions several benefits of the assembly line including:


The gains in productivity allowed Ford to increase worker pay from $1.50 per day to $5.00 per day once employees reached three years of service on the assembly line. Ford continued on to reduce the hourly work week while continuously lowering the Model T price. These goals appear altruistic; however, it has been argued that they were implemented by Ford in order to reduce high employee turnover: when the assembly line was introduced in 1913, it was discovered that "every time the company wanted to add 100 men to its factory personnel, it was necessary to hire 963" in order to counteract the natural distaste the assembly line seems to have inspired.[29]

Sociological problems[edit]

Sociological work has explored the social alienation and boredom that many workers feel because of the repetition of doing the same specialized task all day long.[30]


Karl Marx expressed in his theory of alienation the belief that, in order to achieve job satisfaction, workers need to see themselves in the objects they have created, that products should be "mirrors in which workers see their reflected essential nature". Marx viewed labour as a chance for people to externalize facets of their personalities. Marxists argue that performing repetitive, specialized tasks causes a feeling of disconnection between what a worker does all day, who they really are, and what they would ideally be able to contribute to society. Furthermore, Marx views these specialised jobs as insecure, since the worker is expendable as soon as costs rise and technology can replace more expensive human labour.[31]


Since workers have to stand in the same place for hours and repeat the same motion hundreds of times per day, repetitive stress injuries are a possible pathology of occupational safety. Industrial noise also proved dangerous. When it was not too high, workers were often prohibited from talking. Charles Piaget, a skilled worker at the LIP factory, recalled that besides being prohibited from speaking, the semi-skilled workers had only 25 centimeters in which to move.[32] Industrial ergonomics later tried to minimize physical trauma.

, a 1936 film featuring the Tramp character (played by Charlie Chaplin) struggling to adapt to assembly line work

Modern Times

, a documentary film about the 1984 UAW/CAW contract negotiations shows working life on the floor of the GM Oshawa Ontario Car Assembly Plant (Watch Online)

Final Offer

and flexible manufacturing systems, involving Post-Fordism and lean manufacturing-influenced production

Reconfigurable

Homepage for assembly line optimization research

Assembly line optimization problems

History of the assembly line and its widespread effects

Cars Assembly Line