2.2 Multi-Tier Attribute Assessment for Educational Microgrid Infrastructure
A rigorous assessment of higher education microgrid resilience under severe load-shedding regimes requires moving beyond binary indicators of grid connectivity. Conventional evaluations often record whether an institutional estate is physically connected to the electrical network without capturing operational capacity, reliability constraints, or tariff burdens. To capture these socio-technical complexities, this methodology employs the Multi-Tier Framework (MTF) to evaluate distributed energy systems across a spectrum ranging from Tier 0 to Tier 5 (Eastern Cape Microgrid Study, 2026). As empirical evidence from South African decentralised infrastructure demonstrates, projects designed to achieve upper tiers such as Tier 4 frequently experience performance degradation to between Tier 0 and Tier 2 when affordability and economic viability are compromised (Eastern Cape Microgrid Study, 2026). Therefore, the methodological matrix incorporates institutional affordability and operational reliability as primary scoring criteria rather than subordinate technical dimensions. To ensure systematic synthesis across divergent provincial environments, the evaluative protocol couples the multi-tier schema with a structured literature appraisal across indexed databases, including Scopus and Web of Science (Economic Sustainability Assessment, 2005). Predefined inclusion criteria are applied to identify critical institutional constraints, capital deployment disparities, and infrastructure baselines across South African contexts (Economic Sustainability Assessment, 2005). By synthesizing multi-tier energy metrics with comprehensive database search strategies, the research design establishes a balanced protocol capable of diagnosing both spatial inequalities and localized resilience thresholds across tertiary estates.