Definition of "systematisation"

With the exception of the Great Eastern Line, these embody the most complete systematisation of steam or diesel-operated main line services that has yet taken place in the country.

1961 October, “The winter timetables of British Railways”, in Trains Illustrated, page 590

The abundance and original nature of the specimens prompted us to undertake a deep survey of both morphological and molecular traits aiming at a reliable systematisation of the new taxon.

2015 July 9, “An Integrated Morphological and Molecular Approach to the Description and Systematisation of a Novel Genus and Species of Macrodasyida (Gastrotricha)”, in PLOS ONE‎