What Makes a Ranking Reproducible
Launch library · evergreen read

A genuinely reproducible ranking is one where an independent researcher, given the very same raw data and the very same clearly documented rules, could recalculate the final order and arrive at essentially the very same result the original compiler actually published. That precise replication is a genuinely demanding standard few informal rankings ever actually manage to meet.
Reproducibility depends heavily on precise, unambiguous documentation, since even small undisclosed judgement calls, such as how exactly ties get broken, can quietly prevent an outside researcher from ever cleanly replicating the original published ranking at all. Even one small undocumented judgement call is enough to quietly break that chain of reproducibility entirely.
Charts that genuinely achieve reproducibility earn a particular kind of credibility that goes well beyond simple stated intention, since their claims of fairness can actually be tested and verified rather than simply taken entirely on faith by their audience. This tested, verifiable credibility sets a genuinely rigorous chart apart from one relying purely on stated intention.