This research aims fundamentally to determine the link between structural requirements and the feasibility of 360-degree performance appraisal system establishment so as to enhance staff satisfaction and consequently improving the performance at Petropars Firm. Deductive and descriptive statistical methods have been applied to analyze the data obtained from received questionnaires, and at inferential level, correlation and chi-square tests have been executed to examine our hypotheses as well as the independency amongst variables, respectively. General analysis of research results reveals that there is a significant relationship between building possibility of 360-degree performance assessment system and variables of organizational structure dimensions.