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Modular construction (MC) is associated with prefabricated or off-site constructed building units, such as walls, floors, rooms, and frames, which are assembled at construction sites. MC involves the production of building units in factories under stipulated requirements, including material standards, manufacturing processes and conditions, and product testing. Its on-site installation involves stringent methods that must comply with construction codes and standards. MC differs from conventional construction in that walls, flooring, and other building fittings are built on-site.

By construction type, the MC market is segmented into permanent MC and relocatable MC. MC material is categorized into wood and non-wood. By end user, the market is segmented into commercial, institutional, public and infrastructure, industrial, and residential. The study focuses on MC that includes module types such as room, roof, wall, and window. It excludes prefabricated products such as kit sets, structures, scaffolding, frames, and formwork.