Butiku, Peter N.2024-11-082024-11-082016APAhttps://scholar.mzumbe.ac.tz/handle/123456789/1677A dissertation in partial fulfillment of the requirements for the award of the degree of Masters of Science in Human Resource Management (MSc-HRM) of the Mzumbe UniversityThis study sought to investigate “the roles of supervisors in the implementation of the Open Performance Review and Appraisal System (OPRAS) in Public organisations; a case of Serengeti National Park. The study was confined into four specific objectives which were: to examine the awareness of employees in the implementation of OPRAS, to examine the opinions of employees on the implementation of OPRAS, to identify factors affecting the support of supervisors in the implementation of OPRAS, and to suggest possible measures to mitigate challenges facing supervisor support in the implementation of OPRAS in Serengeti National Park. A case study research design was adopted and a total sample of 66 was consulted. The stratified purposive sampling and coincidence sampling techniques were used to select respondents. Interviews, questionnaires and documentary review were employed as tools of data collection. Qualitative data were analysed by content analysis while the quantitative data were analysed by SPSS programme. The data were presented in tables. The study findings revealed that employees at Serengeti National Park are not totally aware on the implementation of OPRAS. They only understand the concept of OPRAS but in practice it is not fully implemented. Again the study findings revealed that opinion of employees is that the status of implementation of OPRAS is good. Furthermore, the study findings revealed that factors affecting the support of supervisors are low level of understanding OPRAS process, problems in setting objectives, lack of commitment and insufficient use of OPRAS for HRM decisions. Finally, study findings revealed that solution to improve OPRAS implementation is the provision of training and evaluation feedback, constant communication and computerisation of the OPRAS system. The study recommended that Serengeti National Park management should train its employees together with computerisation of the OPRAS system in order to ease communication, and be able to quick access of appraisal reports for Human Resource decisions. Lastly, the custodians of public organizations should put more emphasis on auditing the aspects of the roles of supervisors in OPRAS implementation.enPerformance appraisalPublic organizationPerformance appraisal systemThesis