Implementing a structured methodology that encompasses the entire software development life cycle can have a marked effect on an enterprise.

实现一个结构化的、包括整个软件开发生命周期的方法将对一个企业造成显著的影响。

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As the most costly and complex phase in software product 's life cycle, software maintenance has a direct and important effect on the quality and reliability of software products.

软件维护作为舰艇装备软件生命周期中费用最高、工作最复杂的一个阶段，对软件产品的质量和可靠性均有着直接而重要的影响。

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And the life cycle cost analysis is used to make an item policy to develop a systematic countermove according to the arrangement of the technical parameters and the effect optimization.

运用寿命周期费用分析法进行项目决策，按桥梁技术参数排序法和使用效果优化法进行系统决策。

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