In the manufacturing industry, a production line is the methodical process by which a product is assembled one part at a time. A production line is also known as an assembly line, factory line, or factory. It is a common misunderstanding to refer to a conveyor belt or other mechanical system that physically transports the product from one station to the next as a production line; this is due to the fact that the conveyor belt does not physically transport the product from one station to the next; however, this is a common misunderstanding. Factory workers or machines perform a wide range of tasks at each station in the manufacturing process, which can include everything from attaching a component to a finished product to conducting an inspection, in addition to completing any other tasks that are critical to the project's completion.

The product assembly process was not carried out on the first Production Line due to a clerical error on the part of the factory staff. As a result of assigning specific responsibilities to people at various points along the line's journey, the initial goal of the production line was to transform raw materials, such as cotton fibers, into useful commodities for sale. This was accomplished through the assignment of specific responsibilities to individuals at various points along the line's journey. A similar approach was used to develop the automated assembly line that we are all so familiar with in modern manufacturing today.

Even though Eli Whitney developed the concept in 1869, it was not fully realized until 1913, when Henry Ford introduced the concept into mass production of automobiles with the introduction of the Model T. Since then, the production line has been in continuous operation. As shown in the diagram below, Ford was able to put into place a moving line of automobiles in various stages of assembly that passed through factory worker stations as they moved through the assembly line. This allowed Ford to make full use of the production line concept and maximize profits. As soon as the cars arrived at a station, a new component was attached to them and the cars were then transported to the next station in a circular fashion.

In addition to making mass production significantly easier, the introduction of manufacturing lines resulted in significant time savings for each automobile produced as a result of the reduction in labor costs. Thus, low-cost automobiles were able to keep up with the demand for new technology that existed among the general public during that time period. Several other manufacturers copied and implemented Ford's production line concept as a result of the company's success, which resulted in the Production Line procedure becoming more standardized.

Manufacturing became more efficient as a result, allowing companies to produce more advanced technology and other products while employing fewer workers in subsequent decades. Assembly lines for mass production have resulted in lower prices for finished goods produced as a result of the manufacturing process, while the overall quality of goods produced has improved as a result of the use of assembly lines for mass production. A number of manufacturing processes have been streamlined to the point where human factory workers have been replaced by machines that can achieve even greater cost savings and productivity increases than they were previously capable of. Using automation to complete tasks that would have previously required a human manufacturing worker to put his or her life or limb in danger in order to complete the tasks is a win-win situation.