How to determine if someone may have a drinking problem?
What can be done?

What are possible means of recovery, or treatment if someone has a drinking problem?

Can you provide more info into the situation?

One will not recover from a problem until they recognize that they have a problem.

There are many indications that a person may have a drinking problem. A few of the simplest are:

Drinking often or drinking a lot.
Needing to drink.
Drinking at inappropriate times (say, before work)
Using alcohol as an excuse.
Using alcohol as an escape.

Just the fact that you're asking this question is a sign that that person is having an alcohol problem. You're concerned.