The concept of sustainability involves several variables that must be carefully identified and analyzed to provide solutions which ensure the short-, medium-, and long-term well-being of society. As per European standards, environmental, economic, and social/functional considerations are mandatory for any and all sustainability assessments. As these considerations (or better yet, requirements) have different units of measurement, multi-criteria value models are required to normalize, aggregate, and compare requirements between different solutions. One model (or method) used for this is the integrated value model for sustainable evaluation (MIVES), which allows for a quantitative assessment using multi-criteria analysis based on user defined value functions and requirements. The present work covers sustainability assessments using MIVES. Geotechnical structures (i.e., reinforced soil walls) are used as example scenarios. Special attention is given to the weighting of each requirement based on possible stakeholders’ priorities with respect to the aggregated results.