Final answer:
The dining room manager should have provided professional support and guidance to the new server during a busy lunch hour instead of publicly reprimanding them, aiming to improve performance and maintain a positive work environment.
Step-by-step explanation:
During a busy lunch hour in a restaurant, when a new server begins to fall behind and makes many mistakes, it is crucial for the dining room manager to handle the situation professionally and constructively. Instead of publicly reprimanding the server, which can lead to a negative work environment and further distress to the server, the manager should have taken a more supportive approach. This includes addressing any customer complaints in a calm manner, offering to help the overwhelmed server catch up, and providing guidance on how to manage orders more effectively. Afterwards, a private conversation with the server to discuss what went wrong and how to improve is the best practice. Positive reinforcement and adequate training can prevent future mistakes and maintain both staff morale and the overall reputation of the business.