The experienced and qualified somelier can be identified by a number of attributes. He is a professional who:
Suggests but never an imposes a choice of wine
Never questions a customer's request to change a bottle, but complies immediately
Gives precedence to the preferences of any ladies in a group
Defers to a customer who is (or presumes to be) an expert on wine
Proposes an alternative to a wrong choice of wine by a customer as an experiment which might interest the fellow diners
Never serves too many different wines during a meal. As a rule two is the minimum and four the maximum
Is careful not to get in the way of the maitre or the waiters
Demonstrates self-confidence and authority by executing his duties quickly, simply and discretely
Offers information only at the request of the client
Is concise
Knows the complete background of all the wines on the list
Presents himself for work in good health and with the proper attention to his personal appearance, in particular to his hair and manicure
Keeps his uniform clean and smart
Develops psychological insights into the behaviour of his customers.