> ## Documentation Index
> Fetch the complete documentation index at: https://docs.activeviam.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Epoch

> The Epoch dimension in FRTBCombinedCube, providing the Epoch hierarchy that lists available what-if branch names used to select and compare different scenario branches in the cube

The **Epoch** dimension contains the following hierarchies:

<CardGroup cols={2}>
  <Card title="Epoch" href="../../epoch">List of what-if branch names.</Card>
</CardGroup>