Structure is a vital element of the interview for a number of reasons. Firstly, candidates expect you to take control and guide the proceedings. It looks professional and helps to use available time in the best possible way. Secondly, it lets you be confident that you have covered all relevant areas - you can hardly ring the candidate up afterwards and say 'Sorry, but I forgot to ask...'. Finally, it enables you to compare candidates. An unstructured approach may gather a wealth of information, but how can you accurately score it to compare people fairly?
The interview can be broken down into the following stages:
Immediately after the interview, take time to make notes on anything said that is directly relevant to your final decision. Do this while the conversation is still fresh in your mind. The final decision should be based on how closely each candidate matches the person specification for that particular job.