挣值管理（EVM）是项目管理方式的技术进步的客观衡量项目绩效和 EVM的有能力结合在一个单一的集成系统，范围，进度和成本的测量。挣值管理是它能够提供准确的预测项目绩效显着的问题。EVM的研究表明，早期的规划和控制的地区有显着影响其使用，并同样地，使用该方法提高了两个范围的定义，以及对整个项目的执行分析。-Earned value management ( EVM ) is a project management technique for measuring project performance and progress in an objective manner. EVM has the ability to combine measurements of scope, schedule, and cost in a single integrated system.Earned Value Management is notable for its ability to provide accurate forecasts of project performance problems.Early EVM research showed that the areas of planning and control are significantly impacted by its use　and similarly, using the methodology improves both scope definition as well as the analysis of overall project performance.