Hiring new people is risky. A brief interview must be utilized to its full potential to tell you the most about the person you are interviewing, and possibly hiring. Knowing the right questions to ask can save you a lot of time and unnecessary deliberation and help avoid mistakes.
Some tips for effective interviewing: Know what you are looking for. Isolate what is critical to the position, and what duties are trainable. Writing a job description is a good way to clarify your ideas. Read the resume or application in advance of the interview. Know what questions you are not allowed to ask in an interview. Take good notes. Have at least two people interview the candidate.