In order to build resilient systems that can be operational for a long time, it is important that analysts are able to model the evolution of the requirements of that system. The Evolving Intentions framework models how stakeholders’ goals change over time. In this work, our aim is to validate applicability and effectiveness of this technique on a substantial case. In the absence of ground truth about future evolutions, we used historical data and rational reconstruction to understand how a project evolved in the past. Seeking a well-documented project with varying stakeholder intentions over a substantial period of time, we selected requirements of the Toronto Spadina Expressway. In this paper, we report on the experience and the results of modeling this project over different time periods, which enabled us to assess the modeling and reasoning capabilities of the approach, its support for asking and answering ‘what if’ questions, and the maturity of the underlying tool support. We also demonstrate a novel process for creating time-based models through the construction and merging of scenarios.

中文翻译：

---

重建过去：以斯帕迪纳高速公路为例

为了构建可以长时间运行的弹性系统，分析人员能够对该系统需求的演变进行建模非常重要。Evolving Intentions 框架对利益相关者的目标如何随时间变化进行建模。在这项工作中，我们的目标是验证该技术在实际案例中的适用性和有效性。在缺乏关于未来演变的基本事实的情况下，我们使用历史数据和理性重建来了解一个项目在过去是如何演变的。为了在相当长的一段时间内寻求具有不同利益相关者意图的有据可查的项目，我们选择了多伦多 Spadina 高速公路的要求。在本文中，我们报告了在不同时间段内对该项目进行建模的经验和结果，这使我们能够评估该方法的建模和推理能力、它对询问和回答“假设”问题的支持以及底层工具支持的成熟度。我们还展示了通过构建和合并场景来创建基于时间的模型的新过程。