A classification includes objects (defined by the nomenclature) into levels or classes, according to hierarchical criteria fit for purpose (A classification serves a purpose defined). These criteria are prioritized in order to obtain clusters whose size decreases with the degree of accuracy. They vary according to: nature of materials, use, origin, technology ...
By partitioning a set of object classes and sub-class consisting of elements more and more similar and according to criteria corresponding to a precise and logical accepted classification is a research tool .
is also a tool for economic analysis and comparison to a standardized approach by successive levels whose degree aggregation is chosen according to the level of analysis relevant to the observer (economic representation). This function only makes economic sense if the same classification is used by all economic entities (manufacturers, distributors, consumers).
In the case of drugs, both classifications are commonly used:
ATC (Anatomical Therapeutical Chemical Classification managed by WHO Europe), focusing on users and EphMRA (European Pharmaceutical Marketing Research Association classification) marketing purposes.
In the field of medical devices consumables, CLADIMED is the choice of hospitals and suppliers.
