求翻译：在开发建设项目造价管理中，制定工程签证管理方法加强工程签证控制范围，可以让工程签证费用占工程造价的比例有一定缩减，让开发建设项目的工程造价得到真实的反应和有效控制。是什么意思？

In the development and construction project cost management in developing engineering visa management methods to enhance the visa control, you can have the visa fee percentage in construction cost of engineering a certain reduction, development and construction project of the reaction by the real and effective control of project cost.