mo hinh su dung lai dua tren viec su dung lai

- he thong dua tren su tich hop cac he thong d aco

- ca buoc:phan tich thnah cac thanhphan--> thay doi cac yeu cau--> thiet  ke he thong dua tren cai cu(model co san) --> phat trien va tich hop

- su lap lai quy trinh: xem su laplai quy  trinh nhu 1 nen tang

- cung cap cach quanly cac rui ro chu ko phai bo qua

- luon tien hoa

- cac yeu cau he thong luon nay sinh trong suot qua trinh cua du an do do viec lap lai cac quy trinh giup chuan hoa cac yeu cau va dac t alai he thong