(1)系統(tǒng)調(diào)查和需求分析; (2)分析問(wèn)題的性質(zhì)和求解問(wèn)題; (3)面向?qū)ο蟮脑O(shè)計(jì); (4)面向?qū)ο蟮木幊獭?/p>