Besides cost, another big advantage to manufactured housing is quality control. The HUD Code regulates the home's design and construction, strength and durability, transportability, fire resistance and energy efficiency. It also sets stringent performance standards for the heating, plumbing, air conditioning, thermal and electrical systems. All aspects of the construction process are controlled and are continually inspected by not one, but several inspectors. Because construction takes place within a factory, it is not affected by adverse weather conditions, which can interfere with construction and cause delays.
Inventory is better controlled and materials are protected from theft and weather-related damage.
With on-site building, you have to worry about wood and sheetrock getting wet. It's a cost, in both materials and labor, that doesn't need to be factored into manufactured homes. Both Jinks and Ferruggia agree out that the assembly line method of production is much more effective because workers don't have to wait around the site until the time is right to do their particular job. All technicians, craftsmen and assemblers are on the same team and professionally supervised. Ferruggia also points out that each person at each station on the assembly line has one particular job, at which they are proficient.