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Transaction outlier score

The transaction outlier score is a per-transaction signal that reflects how unusual a transaction looks against expected patterns. Spaaza's algorithm assigns each transaction a score between 0 and 1: lower scores correspond to routine transactions, higher scores correspond to transactions that stand out and may be worth reviewing.

The score is a triage hint, not a verdict. It indicates that something about the transaction is worth a second look; it does not classify the transaction as fraudulent and it does not block or alter the transaction in any way.

note

This score describes individual transactions. A separate customer-level signal — the user outlier score — is on the roadmap and will be documented as its own Insight when it is released.

How to use the score​

Outlier scores are most useful as a way to prioritise review effort.

  • Triage by score. Sort transactions in descending order of outlier score and start with the highest. The score helps you find unusual cases more efficiently than scanning by hand or by date.
  • Combine with other context. A score on its own is rarely conclusive. When reviewing a high-scoring transaction, consider the customer's history, the store and till involved, the campaigns redeemed, and any other operational context. The score is one input into the decision, not the decision itself.
  • Use it for review, not enforcement. The outlier score is intended to support review and reporting workflows. It is deliberately not wired into automatic actions such as blocking transactions or cancelling redemptions.

Where to find this in Console​

The outlier score is stored on each transaction, so it appears anywhere transaction data is surfaced in Spaaza Console:

  • In the Transactions area, as a value you can sort and filter on when reviewing baskets.
  • As a criterion when building Customer segments, so you can isolate customers with high-scoring transactions.
  • In transaction exports, for analysis in your own tools.
  • Through Spaaza's API, for systems that consume transaction data directly.

Enabling the transaction outlier score​

The transaction outlier score is off by default and is switched on for your business by Spaaza. To enable it, contact Spaaza. Once it is enabled, new transactions are scored automatically.