The index principles

A ranking should
show its work.

A useful map of pop needs more than a number next to a name.

Three indexes, different questions

We plan to index individual idols, groups, and entertainment companies separately. A performer’s audience, a group’s momentum, and a company’s development record need different measures.

What every published measure will need

1. A named source. A direct link, collection date, metric definition, and any access limits.
2. A fair comparison. The same platform and time window, a clear population, and visible gaps. Missing data stays missing.
3. A reproducible method. Calculations, weights, exclusions, tie handling, and a version history published before any composite score.
4. An honest interpretation. Reach is not talent. Growth is not quality. Editorial judgment is labeled separately from measured data.

Possible signals, not live scores

Public audience reach, growth over a fixed period, release activity, and engagement may help describe momentum. We have not collected a comparable dataset or selected a scoring formula. These are research directions, not a hidden score.

What happens next

Choose one comparable signal, collect a dated pilot dataset, publish its limitations, and let readers inspect the evidence before expanding the index.