Abstract: This study aims to determine the effectiveness of interviews in improving employee performance as an assessment of company’s performance in a business equipment company. Respondents were randomly assigned which included managers (n = 25) and employees (n = 70) both of which are of the two requirements in the feedback interview. Employees who participated in the interview with the manager were observed by their colleagues anonymously. This study found that feedback interview had a better and significant effect on the manager’s performance for the following four months after its implementation than on employees who received feedback interview for the assessment of the performance of the company. The findings of the performance assessment with the intervention indicate that, the effects of feedback interview can relatively improve performance. The results of the study suggested that the interview feedback was proved to be useful for HR managers in finding ways to improve the performance of an organization of human resources, in addition to the traditional performance appraisal.