If you believe that one of your food truck employees is ready for a promotion, be sure you don’t jump right in. Performance in their current role doesn’t always predict performance in a future one.
Gather more information by designing an assignment for the employee that mimics the tasks and challenges of the new job (service window, line cook, truck manager). Be transparent and tell them that you are using this experiment to test their ability. Make it short-term, outlining clear success criteria and an evaluation timeline. Be careful not to invisibly promote someone without recognizing their contributions. Permanently providing more responsibility without a change in title or pay can sap motivation.