    Sentence 1: Component modularization and  prefabrication off-site can reduce the  amount of time cranes are needed on a site,  as well as provide opportunities to reduce  project schedules and*construction costs and  to concentrate jobs’ locally at the  prefabrication facility.    Sentence 2: When work is done off-site,  such as prefabrication, it increases the time  cranes are need on a site and raises  construction costs.