In the same way that it is difficult for individuals to develop a way of evaluating themselves, it is also difficult for organizations and their employees to develop a perfect way of evaluating the performances of their personnel. As such, research on this is still actively being carried out at present, and the personnel performance evaluation methods continue to evolve from the methods that have been developed through research. Discussed in this article are measures of improving personnel performance evaluation. The existing performance evaluation theories and pitfalls are discussed and presented, and the public organizations in South Korea are analyzed to derive practical improvement measures and to improve the personnel performance evaluation methods they are currently employing. The five factors of effectiveness can be considered to encompass the emotional and cognitive responses of the employee, and to cover both the human and the impersonal aspects of evaluation as well as tool usability. Based on the results of the study, a personnel performance evaluation improvement plan was formulated, as presented in this article. It is hoped that this study will be able to make several academic contributions and that the proposed personnel performance evaluation improvement measures will prove useful.