•You drink:
 Whiskey: Up to 3 drinks per week, or
Wine: up to 1 glass per day or 1 1/2 liters per week.
•You don't have:
Physical discomfort when you don't consume alcohol
Frequent drunkenness
Personal or work problems due to alcohol consumption
 

•You drink:  
Whiskey: More than 3 glasses 3 times a week, or
Beer: More than 3 liters per week, or
More than 1 1/2 liters per week
•You don't have: 
Physical discomfort when you don't consume alcohol

Frequent drunkenness

Personal or work problems due to alcohol consumption.
 

•You constantly drink despite the problems this causes (personal, work, social)
•You drink repeatedly in dangerous situations (driving, going to work)
•You don't have
 Physical discomfort when not consuming alcohol which disappears when you drink. 
Frequent drunkenness which stops you from fulfilling your duties. 
The need to drink more and more in order to feel good. 

•You drink a large amount of alcohol since a long time and this causes personal and work problems. 
•You have had frequent drunkenness which interfered with your duties. 
•When you don't drink you have physical discomfort which disappears when drinking. 
Besides: you have tried to stop drinking and you couldn't do it, you have the need to drink more and more in order to feel good, you spend a lot of time trying to get alcohol, you have driven drunk. 

None