The effectiveness of impact assessment (IA) methods has been a neglected topic in procedural effectiveness research, which has placed higher relevance on the quality of Environmental Impact Statements (EISs) and the environment impact assessment (EIA) process in general. This study analysed the effectiveness of methods used in IA in Colombia to demonstrate that they have been used in compliance with the Terms of Reference (ToR) but did not analyse their effectiveness. A total of 131 EIS were analysed using a revised version of the Effectiveness Index for Environmental Impact Assessment Methods (EIM) proposed by Caro and Toro (2016). It is concluded that, even if the environmental authority has accepted the EIS as a requirement for obtaining an environmental license, most of the methods that have been used in these technical documents, obtained a medium or low degree of effectiveness. The parameters regulated for the law have a higher percentage of compliance. The analysis suggests that the guidelines provided for the law, related to the design and implementation of the methods, should be improved to develop an effective EIA.

影响评估 (IA) 方法的有效性一直是程序有效性研究中被忽视的主题，它与环境影响报告 (EIS) 的质量和一般环境影响评估 (EIA) 过程具有更高的相关性。本研究分析了哥伦比亚 IA 中使用的方法的有效性，以证明它们的使用符合职责范围 (ToR)，但没有分析它们的有效性。使用 Caro 和 Toro (2016) 提出的环境影响评估方法 (EIM) 的有效性指数的修订版，对总共 131 个 EIS 进行了分析。得出的结论是，即使环境主管部门已经接受 EIS 作为获得环境许可证的要求，但这些技术文件中使用的大多数方法，获得中等或低程度的有效性。为法律规定的参数具有更高的遵守百分比。分析表明，应改进为法律规定的与方法设计和实施相关的指导方针，以制定有效的环境影响评估。