Water utilities face different challenges that may force them to seek prioritized objectives. When doing so, particular projects may have to be developed, being important to understand their impact on water tariffs, and thus, on customers. Such consequences may bear an increased relevance in cases stressed with, e.g., resource scarcity, poverty, and the need for infrastructure investments. The resulting cost and revenue variability demand a comprehensive study. If the first may require a stochastic modeling (in major cost components) in order to consider its inherent uncertainty, the second needs to be modeled following context-specific objectives set by the relevant stakeholders. The solutions achieved will likely promote distinct revenue sources, as well as diversified water tariff structures. A multi-objective optimization model (i.e., a Framework for Suitable Prices) is built to deal with those diversified requirements (e.g., stochastic energy costs, affordability, cost recovery, or administrative simplicity). The model is solved through achievement scalarizing functions with several weighting coefficients for a reference point, so as to provide a significant perception of possible revenue options (and their impact) to the decision makers. The proposed method is applied to a case study, Boa Vista Island in Cabo Verde, in which the background characteristics, namely water sources availability (e.g., the adoption of desalination technologies), economic development and other contextual factors were considered. The key role of tariff structure selection is displayed, instead of assuming it a priori, giving important insights regarding project feasibility.

中文翻译：

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新时代/新解决方案：替代性关税结构在供水项目中的作用

自来水公司面临各种挑战，可能迫使他们寻求优先目标。这样做时，可能必须开发特定的项目，这对于了解其对水价的影响以及对客户的影响很重要。在例如以下情况下，此类后果可能会增加相关性：，资源稀缺，贫困以及对基础设施投资的需求。由此产生的成本和收入可变性需要进行全面研究。如果第一个可能需要随机建模（在主要成本要素中）以考虑其固有的不确定性，则第二个需要按照相关利益相关者设定的特定上下文目标进行建模。所获得的解决方案将可能促进独特的收入来源以及多样化的水价结构。多目标优化模型（即，对于合适的价格框架）建立对付这些多样化的要求（如，随机能源成本，可负担性，成本回收或管理简便性）。该模型通过成就量化函数进行求解，该函数具有多个参考点的加权系数，从而可以为决策者提供对可能的收入选择（及其影响）的重要了解。所提出的方法应用于案例研究中，位于佛得角的博阿维斯塔岛，其中考虑了背景特征，即水资源的可利用性（例如，采用淡化技术），经济发展和其他背景因素。显示了费率结构选择的关键作用，而不是先验地假设，从而提供了有关项目可行性的重要见解。