Numerous multicriteria decision aiding (MCDA) methods have been developed over the last decades and are now applied in various domains, sometimes using facilitated group workshops to create models. These models are all designed to improve decision processes. However, the lack of follow-up and post-project evaluations limit the understanding of how the participants experienced the group workshops and how the results were subsequently used within the organization. This is in contrast with the public participation research field, where a rich literature was developed for a posteriori evaluation of projects. Based on this literature, our research proposes a framework to evaluate, ex-post, MCDA projects. In order to illustrate this framework, we apply it to an MCDA project in Quebec City where a spatial decision support system to prioritize the redesign of streets as Complete Streets was built. Individual interviews were conducted with the Quebec City professionals that currently use, were leaders of the project, or have participated in the development of the decision support system. This research has identified that the need for change of practices within the workplace, communication problems, and the requirement for multidisciplinary work were at the root of the various challenges encountered during the workshops. Based on our experience, we propose some lessons learned and potential solutions that can enhance the body of literature in MCDA.

在过去的几十年里，已经开发了许多多标准决策辅助 (MCDA) 方法，现在应用于各个领域，有时使用便利的小组研讨会来创建模型。这些模型都旨在改进决策过程。然而，缺乏后续和项目后评估限制了对参与者如何体验小组研讨会以及随后如何在组织内使用结果的理解。这与公众参与研究领域形成对比，公众参与研究领域为项目的后验评估开发了丰富的文献。基于这些文献，我们的研究提出了一个框架来评估、事后、MCDA 项目。为了说明这个框架，我们将其应用于魁北克市的一个 MCDA 项目，在该项目中，空间决策支持系统在建成完整街道时优先考虑街道的重新设计。与魁北克市目前使用的、项目的领导者或参与决策支持系统开发的专业人员进行了单独访谈。这项研究已经确定，工作场所内实践改变的需要、沟通问题和多学科工作的要求是研讨会期间遇到的各种挑战的根源。根据我们的经验，我们提出了一些可以增强 MCDA 文献主体的经验教训和潜在解决方案。是该项目的领导者，或曾参与决策支持系统的开发。这项研究已经确定，工作场所内实践改变的需要、沟通问题和多学科工作的要求是研讨会期间遇到的各种挑战的根源。根据我们的经验，我们提出了一些可以增强 MCDA 文献主体的经验教训和潜在解决方案。是该项目的领导者，或曾参与决策支持系统的开发。这项研究已经确定，工作场所内实践改变的需要、沟通问题和多学科工作的要求是研讨会期间遇到的各种挑战的根源。根据我们的经验，我们提出了一些可以增强 MCDA 文献主体的经验教训和潜在解决方案。