According to the US National Park service, London carpenter H. John Manning conceived the possibly first ever advertised prefabricated home called “Manning Portable Cottage” in 1830. It was built component by component and then was shipped and assembled by British emigrants. Prefabrication refers to the practice or method of assembling buildings or components of structures at a location different from the construction site, such as a factory, home, hotel, or manufacturing site. The process also involves transporting either complete assemblies or sub-assemblies to the construction site.

• Cost-effective – In most cases, transporting partial structure assemblies from a factory or manufacturing site incurs lower costs compared to transporting raw materials and resources to each site.
• Reduced environmental impact – Off site/on site fabrication of components and structures can result in reduced pollution, job site disturbance, and disruption of flora and fauna.
• Improved safety – Since some or most of the structures are pre-assembled and transported to the construction site, the needed time frame to work on-site can be reduced, which can then impact worker safety positively. In relation to that, the construction site is less crowded, which would result in fewer injuries. It would also improve efficiency on-site because you have fewer materials in the way that have to be moved around.

1. Preparation of Materials raw materials, equipment, and other resources needed.
2. Transportation of Materials to Off-site Manufacturing Plant or Factory – use of machinery to move materials and prepare for production.
3. Off-site Prefabrication where the actual work of constructing modules or panels of structures is done at a location other than the construction site itself
4. Transportation of Prefabricated Components to Construction Site – moving of prefabricated components to the construction site
5. On-site Assembly where the prefabricated components are integrated or installed into the structure or building on-site