The proposed system design is based on B / S of the three-tier architecture, using waterfall model that is the life cycle methodology developed.
系统采用了基于B/S的三层体系结构，利用瀑布模型即生命周期方法学进行软件开发。
More and more software organizations are moving away from the waterfall model of the life cycle to an iterative approach.
越来越多的软件组织开始从瀑布式模型向迭代式模型转变。
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