(1)系統(tǒng)總體設(shè)計(jì) (2)數(shù)據(jù)庫(kù)詳細(xì)設(shè)計(jì) (3)系統(tǒng)功能設(shè)計(jì) (4)應(yīng)用模型和方法設(shè)計(jì) (5)輸入、輸出設(shè)計(jì)