Transitions link all workflow components together, essentially completing the design.
To set transitions, click on the Transition element icon on the element menu; your mouse cursor should change into a Transition icon. Click on the activities one by one to join them following the order in which they should occur. When you're done, the process should look like this:
In the expression box, key in:
Essentially, we're checking for the variable name "supervisorApproval" and ensuring that the value contained is "yes". For more information about workflow variables, refer to Workflow Variables.