advantages: it improves the attention of employees, disadvantages: the cooking time in the back kitchen is tight.

1. It is forbidden to go to the canteen to cook in advance, which prevents employees from paying more attention to catering and neglecting their work, thus improving their attention.

2. With the precedent that employees go to the canteen to cook in advance, other employees will be psychologically unbalanced and follow suit, which will lead to the kitchen staff in the canteen working early and the cooking time is tight.