How does Archera Attribute Commitment Costs & Savings? Do Segments Affect this?

Are savings from RIs/SPs bought in an Archera segment, attributed to resources in that segment? What about RIs/SPs bought directly w/ AWS?

This touches on a concept that we call "Attribution" in Archera which handles which RIs & SPs are applied to which resources within your account, along with associated costs & savings.

AWS has a default attribution strategy, where all commitments are applied against all resources based on what gets the highest discount, and for resources that get the same discount, attribution in a arbitrary manner. This behavior applies both to commitments purchased natively through AWS costs explorer and commitments purchased through Archera, even if they were purchased for a particular segment.

Archera, by default, employs the AWS default attribution strategy. We do this because the default attribution strategy aligns with what will be shown on your AWS bill and usage report. Using a different attribution strategy could lead to discrepancies between AWS and Archera in terms of the precise cost of each resource.

However, for customers seeking an alternative chargeback model distinct from the AWS default, featuring a custom attribution strategy, we offer the capability to support custom attributions for any Reserved Instance (RI) or Savings Plan (SP) through our Custom Reporting Functionality. This feature is employed by our enterprise customers for in-depth analysis of COGS, margin, BU showback/chargeback, and other customized functionalities.