Hi
The attention to small details are most essential to ensure that people carry back with them a good and positive experience. These could include the following:
1 Ensuring that the candidates interview call letter address him/ her with the correct spelling of his/her name.
2 The day, date, time and venue (including directions to reach) and the person to contact on arrival are clearly mentioned in the letter. Ensure that you schedule interviews so that there is sufficient time gap between two successive interviews.
3. Give the contact name and phone number of the person from the organization who can be contacted by a candidate for any additional inputs / clarifications the candidate may seek. ( Do not give the mobile number)
4.Ensure the venue is prepared in advance for the interviews and that the interview panel are ready well before the first candidate arrives.
5. Ensure that there is a responsible person to attend to the requirements of the candidates who arrive.
6. Ensure that the venue be well furnished, neat and that there is provision for water/ tea etc. for those waiting. Also keep current newspapers/ magazine/ corporate leaflets/ in house magazines for those coming for the interviews to read when waiting their turn.
7. In case travel allowance is being paid for attending the interview, ensure that the reimbursement process is properly streamlined.
8. In case the interview process spills over during lunch time ensure that those present are offered lunch.
While a feedback form from the candidates finishing the interview could be explored to arrive at some measure of the interview process, most candidates would be favorably biased towards the process for they would apprehend that criticism could impact the final outcome. Hence the feedback form would have to be carefully designed and more importantly the feedback process must be carefully calibrated to give interviewees the confidence that the feedback and the interview outcome are mutually exclusive. The interviewee should also be reasonably satisfied that the feedback process is a genuine attempt by the corporate to improve their own standards of conducting the interview process.
PS. You could also experiment with giving the candidates a thank you letter for attending the interview with a clear indication in the letter of when the candidate can get to hear from the organization about the interview outcome. This could also be supplemented with a not so expensive take away like a company key chain/pen / poster etc.
Trust the above inputs would enable you to implement your plans to be different in the market place.
Best Wishes