Figure 1: Waterfall software development lifecycle.
图1：软件开发生命周期的瀑布模型。
If your project is mainly a network redesign or a server consolidation project with very little software development, you might be better sticking with a traditional waterfall approach.
如果你的项目主要是网络的重新设计或者是一个只有少许软件开发的服务器固化的项目，用传统的瀑布方法也许会更好。
In 1985, almost all projects with a well-defined Software Development Lifecycle (SDLC) used the waterfall model, shown in Figure 1.
在1985年，几乎所有明确定义了软件开发生命周期(SDLC)的项目都采用了瀑布模型，如图1所示。
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