The goal for interviewing effectively is to note their thinking patterns, and not get caught up in appearances, impressive schools or companies. During the interview, more specific questions are helpful in making successful hiring decisions. Please describe in detail what brought about the change. Ask how the candidate would handle a specific problem that you have seen in the position. Once a candidate has been selected to be hired, then the most difficult part of the hiring process begins - reference checking.
Many firms find professional organizations helpful when making background checks.
Through personality testing, you can reduce the possibility of making a hiring error. I have researched a number of personality test programs, and found the 16PF Inventory to be one of the best. This inventory incorporates over 40 years of clinical research and provides a thorough business-friendly evaluation of candidates. It is similar to an X-ray machine, where it identifies the inner traits of the candidate. This helps a company understand the positive and negative attributes of the candidate, so they know who they are hiring.