Planning Workflow
The Planning Workflow takes place when before the development of a Feature starts. The Workflow starts always with an Open State and ends either with an Accepted or Deferred Status. It is exactly there, when one of these both States is reached, where the Development Worfklow starts:
Detailed information about the workflow here: Release Policy - Planning
Development Workflow
The Devolopment Workflow takes place between the Planning Worfklow and the Deprecation Worfklow. Even though, it only takes place, in case the State Accepted or Deferred was reached in the Planning Workflow.
Detailed information about the workflow here: Release Policy - Development
Deprecation Workflow
The Deprecation Workflow is the life end for a feature. It takes place after the Feature war Released and it goes through three states before it is Removed from the Releases:
Detailed information about the workflow here: Release Policy - Deprecation