Design and fabricate products such as windows and doors ahead of time, as there is no waiting time for frames to be completed. Use more factory manufactured products, which result in cost reduction, better quality control, less skilled or trained labour required and so on. Reducing potential issues from Architect, Engineers, General contractors, and traders. Roof and wall metal cladding could be manufactured on-site and made to use with reduced waste. Increase the productivity of GCs and Trades.