<p>The selection of a Triple Point of Water (TPW) cell as a national reference is critical to ensuring the accuracy and traceability of temperature measurements in National Metrology Institutes (NMIs). Current guidelines, such as those from the both CCT-K7 and CCT-K7.2021 CIPM key comparisons, primarily emphasize physical inspections, verifying the absence of floating materials, the presence of an audible click upon inversion, and estimating internal air bubble size. While these criteria ensure basic cell integrity, they occasionally fail to distinguish between otherwise compliant cells. This study proposes a comprehensive selection methodology that integrates both physical and advanced statistical evaluations to identify the most suitable TPW cell for national use. Four fused silica TPW cells underwent standard physical inspections, followed by a 15-day internal comparison, exceeding the 10-day period typically used in key comparisons. Key metrological parameters including repeatability, immersion profile, and uncertainty were assessed. Reproducibility was quantified using the Higgins equation, offering a robust measure of intra-cell consistency, while inter-cell agreement was evaluated using the Bavelas centrality concept, adapted here as a novel metric for “degree of closeness.” A Comparison Reference Value (CRV) was established to quantify each cell’s deviation from optimal performance. Results demonstrate that the proposed hybrid method improves objectivity and sensitivity in TPW cell selection, enabling more reliable designation of national reference cells. This framework provides NMIs with a practical, reproducible tool for enhancing consistency and accuracy in temperature metrology.</p>