Seriation refers to the chronological ordering of artifacts of a particular class—but of different styles.
The best artifacts are those whose styles changed at a relatively rapid rate and that are found in contexts that can be independently dated using chronometric dating.
For my high school subject, ancient history, we have to learn both typology and seriation dating. "Another early example is the typology published in 1899 by Flinders Petrie for the objects (mainly pottery) found in 900 prehistoric Egyptian graves.
Relative dating methods are unable to determine the absolute age of an object or event, but can determine the impossibility of a particular event happening before or after another event of which the absolute date is well known.
DATING A relative dating technique in which artifacts or features are organized into a sequence according to changes over time in their attributes or frequency of appearance.
The technique shows how these items have changed over time and it is a way to establish chronology.
At least some objects belonging to such a typology should be datable by other criteria to fix a typology into a chronological framework. An object category or motif might develop not regularly but in staccato 'jumps'.
Typological dating may foster the tendency to assume that each step in development is of about the same time length, but this does not need to be the case in reality.