Eligible Ranges
Eligible ranges are the products or services whose purchase can contribute to a mechanism. Their definition can be based on references, categories, or periods. Catalog changes and returns must be taken into account. The rule presented to the participant must correspond to the one applied in the data.
A concrete example
A campaign rewards a list of product references over a given period. The engine applies the reward scale to the product and the date of the operation, after checking for exclusions.
A point to consider
A commercial range name does not replace a reliable reference system. Version the references and process code changes.
Maintain the rule applicable at the time of purchase
Associate a validity period and a versioned points schedule with each product reference. Keep this version to explain the points even if the catalogue changes later. Prepare for substitutions, batches, and unknown references. An unrecognized product must be able to be reviewed without being automatically accepted or definitively rejected by default; the participant receives an appropriate status and explanation.
Questions to ask your team
- Does an earlier purchase retain its original earning rules?
- Who approves the addition of a reference and its effective date?


