可接受的原型，开发者和用户将决定最后的原型和数据库是否能交付使用。如果系统（包括数据库）效率很低，那么系统和数据库将被重新编程和重新组织以达到期望的性能。随着可视化编程工具（如VisualBasic、Java、VisualC和第四代语言）越来越流行，利用可视化编程工具可以很方便地修改用户与系统间的界面，原型法正成为可供选择的系统开发方法。使用原型法改变用户报表和显示的内容和布局是相当容易的。在这个过程中，新的数据库需求被确定，因此被发展中的应用使用的现存的数据库应该进行修改。甚至有可能为一个需要新的数据库的系统使用原型法，在这种情况下，当系统需求在迭代的开发过程中不断变化时需要获取样本数据以建造或重建数据库原型。
5
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