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Mass production (also called flow production or repetitive flow production) is the production of large amounts of standardized products on production lines. It was popularised by Henry Ford in the early 20th Century, notably in his Ford Model T. more...

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Mass production is notable because it permits very high rates of production per worker and therefore provides very inexpensive products. Mass production is capital intensive, as it uses a high proportion of machinery in relation to workers. With fewer labour costs and a faster rate of production, capital is increased while expenditure is decreased. However the machinery that is needed to set up a mass production line is so expensive that there must be some assurance that the product is to be successful so the company can get a return on its investment. Machinery for mass production such as robots and machine presses have high installation costs.

One of the descriptions of mass production is that the craftsmanship is in the workbench itself, not the training of the worker; rather than having a skilled worker measure every dimension of each part of the product against the plans or the other parts as it is being formed, there are jigs and gauge blocks that are ready at hand to ensure that the part is made to fit this set-up. It has already been checked that the finished part will be to specifications to fit all the other finished parts - and it will be made quicker, with no time spent on finishing the parts to fit one another. This is the specialized capital required for mass production; each workbench is different and each set of tools at each workbench limited to those necessary to make one part.

Use of assembly lines in mass production

Mass production systems are usually organized into assembly lines. The assemblies pass by on a conveyor, or if they are heavy, hung from an overhead monorail.

In a factory for a complex product, rather than one assembly line, there may be many auxiliary assembly lines feeding sub-assemblies (i.e. car engines or seats) to a backbone "main" assembly line. A diagram of a typical mass-production factory looks more like the skeleton of a fish than a single line.

This is also used in food manufacturer to produce foods continuously.

Advantages and disadvantages

The economies of mass production come from several sources. The primary cause is a reduction of nonproductive effort of all types. In craft production, the craftsman must bustle about a shop, getting parts and assembling them. He must locate and use many tools many times for varying tasks. In mass production, each worker repeats one or a few related tasks that use the same tool to perform identical or near-identical operations on a stream of products. The exact tool and parts are always at hand, having been moved down the assembly line consecutively. The worker spends little or no time retrieving and/or preparing materials and tools, and so the time taken to manufacture a product using mass production is shorter than when using traditional methods.

Read more at Wikipedia.org