Archimate defines a plateau as a relatively stable state of the architecture that exists during a limited period of time.

There is an illustration of the model element in the Work system pattern (Do).

Category: Implementation and Migration Extension

Examples: Baseline, Transition 1, Transition 2, Target

Typical Relationships: Composition, Aggregation, Specialisation, Triggering

Source: Archimate 2.1 and Archi - The Free ArchiMate Modelling Tool - Hint for the model element.

In the Interaction Dictionary we use the term with a more general meaning, to denote the relatively stable operations in a system as it exists during a period of time.

The term is applied at Operations (Interaction Dictionary).