The quality-of-service knowledge of 192 designated operators, brought into one closed, validated place — and answered in your language, with its source shown.
The network is not a list of countries. Clusters are defined by configuration — a geographical region, or an association such as PostEurope. The same structure repeats from the core down to each operator: every level draws what it needs from above, and contributes back what it learns.
Quality of service touches every part of the network, and the knowledge that supports it has lived in archives, e-mails, documents and the website. The resource centre brings it into one place — and keeps it growing with use.
A closed system has only two honest outcomes. There is no third one where the system fills the gap on its own.