This is an interesting article about how to improve the candidates experience of the recruitment process and what annoys / frustrates them.  Generally it seems to be a lack of information or communication.  

At Dutton Gregory we understand this and respond to every applicant with an acknowledgement email as soon as possible. We keep them updated throughout the process, finishing by letting the candidates know if they have been successful or not.  I have been amazed at the positive feedback I have received when telling candidates that they have been unsuccessful, simply because they were happy to have an answer one way or the other. 

Candidates can be potential customers, or know someone who could use your services, so you want them to leave with a positive impression of the company and not a sour taste in their mouth.