...

• Project, Environment/Instance, Instance Properties
  • Entire Scope is entire workflow execution. Ideally you do not want to modify these properties during workflow execution, but it can be modified to influence execution if necessary.
• FlexFields
  
  • Scope of FlexField value is through Workflow Execution which may be build/deploy/utility. Note that build request FlexFields are associated with Project Version created by build, hence those values are available during deploy execution as well for project version.
  • It makes sense to not modify these inputs during workflow execution.
• Workflow Inputs
  Workflow Inputs -
  • Scope is entire workflow execution. Do not modify during course of workflow execution.
• Workflow Variables
-
• • Scope is entire workflow execution. You can modify value for variables during workflow execution.
• Plugin Inputs
-
• • Scope is specific plugin execution for endpoint.
• User defined Plugin Inputs and Outputs
-
• • Scope is specific plugin execution for endpoint.
• Use unique names for Workflow Inputs, Variables and any user defined Plugin Input or Outputs to avoid any confusion.

Variable Details