IndexFair › Methodology › Complaint clusters
/methodology · v2.1 · append-only · last updated 2026-01
/methodology/complaint-clustersRelated
Complaint clusters
Recurring themes mined from public review text and counted — grouped by the aspect they affect, over a rolling window.
What it means
A complaint cluster is a recurring theme that appears across multiple independent reviews in the same 90-day window. Clustering counts how often a theme recurs and tags it to the affected aspect — it is not a record of complaints upheld, disputes resolved, or any legal finding.
Inputs & data fields
FieldTypeMeaning
cluster_idstringStable identifier for a recognised complaint theme (e.g. "kyc_delay").
aspect_tagenumThe aspect the theme affects: kyc, withdrawal, bonus, support…
mention_countintDe-duplicated mentions in the rolling 90-day window.
trendenumDirection vs. prior window: rising · stable · falling.
Process & formula
- Cluster review text by theme.
- De-duplicate, then count mentions per 90-day window.
- Tag the affected aspect; compute trend vs the prior window.
Not an allegation. A cluster is a count of how often a theme recurs. It is never a complaint upheld, a finding of wrongdoing, or a legal conclusion.
How it affects public pages
KYCVerification delays↑ rising42
Affects the brand’s complaints tab and the dashboard rollup.
Worked example
Lumen Exchange · fake data · 90-day window ending 2026-06
KYCVerification delays↑42
WithdrawalSlow processing→28
SupportSlow response↓17