There are three suggested hierarchy architecture we can use:

Environment Oriented

Break down projects into different environments : Production, Quality Assurance, Development
Can pose challenge when need to deploy services that are used by multiple environments

Function Oriented

One organization that contains one folder per business function
More flexible compared to environment separation and allows to deploy shared resources
More complex to manage

Granular Access Oriented

One organization that contains one folder per business unit
Each business unit folder can contain one folder per business function
Each business function folder can contain one folder per environment
Most extensible and flexible and the most complicated to manage