Hi Sneha, it is good to have feedback from a recruit. I think it is too early to have it done within a month; however, it depends on individuals and their work conditions. For a familiar area in which one is employed, it should not take more time.
For a fresh candidate, it requires more time to get genuine and frank feedback as it is obvious that being a new person, he/she may not express their frank remarks on any matter. However, it is also important who is taking the feedback or to whom the feedback is reported. If it is to be an HR person, it is all the more difficult to take follow-up action on the feedback taken, for the simple reason that the Head of Department (HOD) is the important person who really needs the feedback.
In most employers, it is customary to take the self-appraisal forms by the HR through the HOD with his/her remarks on some pertinent reporting of the recruits. In some firms, there are two sets of forms, one to be submitted directly to the HR which normally should be treated as confidential and the other through the HR. The contents of these forms, other than general information of the recruits, would include brief particulars that could be drafted to suit one's requirements, varying from department to department. We shouldn't make a mistake by asking an employee to fill out forms that are common for all types of employees. You should have a different set of forms for different areas/levels of employment. Only then will this process be meaningful; otherwise, it will be merely customary.
It is also important to concurrently analyze the remarks of the HOD on the performance of a recruit to avoid inconsistencies or conflicts, if any. It also goes without saying that HODs prevail, except in some exceptions.
Wishes,
Kumar S.