This report focusses on performance management system of O’Mara Electronics. The company is suffering from low profitability. It is seen that its market positioning is declining. It has been observed that a diagnosis on performance management systems of the respective company has been conducted in this particular study. The difference between two performance systems are explained in this particular study. Possible suggestions for improving the performance management system are provided in this specific study. It can be concluded that by using both 360-degree feedback and self-appraisal, the company will able to improve its performance management system.