What does the term 'factory-built' imply?

The term 'factory-built' refers to structures that are constructed in a factory setting under controlled conditions. This manufacturing process ensures a consistent level of quality and efficiency, as the environment allows for precise assembly using standardized materials and methods. Factory-built structures typically undergo rigorous inspections and adhere to specific building codes before they are transported to their final site for installation.

This approach contrasts with on-site construction, where factors such as weather and local material availability can influence the building process, potentially leading to variability in quality and completion times. Additionally, while modular units and off-site assembly can relate to factory-built constructions, the defining characteristic remains the controlled factory environment within which the entire building process occurs. Therefore, the precise definition aligns with the provided answer.