I have published an InfoQ news post about the AWS team's efforts to introduce centralized and policy based cross-account cost and security governance at scale:
After a three month preview since re:Invent 2016, Amazon Web Services has recently moved AWS Organizations to general availability. The new service allows users to centrally manage multiple AWS accounts within a hierarchy of organizational units and attach service control policies with fine-grained access permissions. AWS Organizations also supersede the formerly separate consolidated billing feature.
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Continue reading the full post in AWS Organizations Offers Centralized Policy-Based Account Management.