This technical article disucsses how operational research uses Multiple Criteria Decision Methods (MCDM) like TOPSIS and VIKOR to assess predetermined alternatives against conflicting criteria, ranking them based on factors like techno-economic and environmental considerations. In the XGAIN Knowledge Facilitation Tool (KFT), MADM is integrated to evaluate and rank technological solutions for rural user needs, factoring in different criteria and user preferences. This work has been developed in the context of the XGain project (101060294). XGain fosters a sustainable, balanced, and inclusive development of rural, coastal and urban areas by facilitating access to relevant stakeholders to a comprehensive inventory of smart XG, last-mile connectivity and edge computing solutions, and of related assessment methods. Learn more at xgain-project.eu.