Parallel stages are two or more process stages that will receive requests simultaneously. Each parallel stage has the Entry and Exit stages as the same by default. You can configure the parallel stages while creating the workflow.
If you want to configure a different exit stage based on your use case then follow the below steps:
- Click on the Control Center -> Parallel Stages icon.
- Configure the exit stage for the Parallel Stage.
For instance, imagine a travel request workflow where the request needs to be reviewed by the Travel Desk and a Manager simultaneously. In this case, you can use parallel stages to send the request simultaneously to both the Travel Desk stage and Manager stage.
Exit stage use case:
In the above mentioned scenario, the request is split and sent to the Travel Desk and Manager Review simultaneously. They join together again after the Travel Desk completes their task and the Finance Review Status is Approved. In such a case, you may specify the Exit Stage as shown in the picture below from the Control Center. 
Ensure that the Travel Desk and Finance Review has the same rule. The below screenshot illustrates the rule defined for Travel Desk:
The below screenshot illustrates the rule defined for Finance Review:
Flowchart of the Travel Request workflow: (Exit Stage use case)
Note: After the workflow is published, all changes to the workflow such as form designer, inserting new stages, additional rules have to be done in the Control Center.