▁in ▁one ▁location ▁for ▁the ▁duration ▁of ▁their ▁useful ▁life . ▁ ▁Man ufact uring ▁consider ations ▁The ▁entire ▁process ▁of ▁mod ular ▁construction ▁places ▁significance ▁on ▁the ▁design ▁stage . ▁This ▁is ▁where ▁practices ▁such ▁as ▁Design ▁for ▁Man ufact ure ▁and ▁Assembly ▁( D f MA ) ▁are ▁used ▁to ▁ensure ▁that ▁assembly ▁toler ances ▁are ▁controlled ▁throughout ▁manufact ure ▁and ▁assembly ▁on ▁site . ▁It ▁is ▁vital ▁that ▁there ▁is ▁enough ▁allow ance ▁in ▁the ▁design ▁to ▁allow ▁the ▁assembly ▁to ▁take ▁up ▁any ▁" s lack " ▁or ▁mis align ment ▁of ▁components . ▁The ▁use ▁of ▁advanced ▁C AD ▁systems , ▁ 3 D ▁printing ▁and ▁manufact uring ▁control ▁systems ▁are ▁important ▁for ▁mod ular ▁construction ▁to ▁be ▁successful . ▁This ▁is ▁quite ▁unlike ▁on - site ▁construction ▁where ▁the ▁tr ades man ▁can ▁often ▁make ▁the ▁part ▁to ▁suit ▁any ▁particular ▁installation . ▁ ▁Adv antages ▁ ▁Mod ular ▁buildings ▁are ▁argued ▁to ▁have ▁advantages ▁over ▁conventional ▁buildings , ▁for ▁a ▁variety ▁of ▁reasons . ▁ ▁Speed ▁of ▁construction / f aster ▁return ▁on ▁invest ment . ▁Mod ular ▁construction ▁allows ▁for ▁the ▁building ▁and ▁the ▁site ▁work ▁to ▁be ▁completed ▁simultaneously . ▁According ▁to ▁some ▁materials , ▁this ▁can ▁reduce ▁the ▁overall ▁completion ▁schedule ▁by ▁as ▁much ▁as ▁ 5 0 %. ▁This ▁also ▁reduces ▁labor , ▁finan cing ▁and ▁super vision ▁costs . ▁To ▁save ▁even ▁more ▁time ▁and ▁money , ▁nearly ▁all ▁design ▁and ▁engineering ▁discipl ines ▁are ▁part ▁of ▁the ▁manufact uring ▁process