Browsing by Author "Jaffu, R."

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    Doctor of philosophy students’ academic success and the role of personal values
    (Emerald, 2024) Jaffu, R.
    Purpose The study determined the role of personal values in doctor of philosophy (Ph.D.) students’ academic success in Tanzania. Specifically, it looked into the influence of openness to change values, self-enhancement values and conservation values on Ph.D. students’ academic success. Design/methodology/approach The study employed a cross-sectional survey design, in which 200 Ph.D. students from Tanzanian universities were involved by responding to a questionnaire. The relationship between the variables was determined by using structural equation modeling, and testing of the measurement model was done by confirmatory factor analysis (CFA). Findings The results indicate that personal values influence Ph.D. students’ academic success. Particularly, openness to change values have an ß value of 0.209 and p value of < 0.001, self-enhancement values have an ß of 0.173 and p-value of < 0.001 and conservation values have ß of 0.339 and p-value of < 0.001. Practical implications In the quest to improve Ph.D. students’ academic success, universities and Ph.D. students should foster openness to change values, self-enhancement values and conservation values in Ph.D. students. Originality/value The results of this study extend the use of the Schwartz theory of basic human values in explaining the academic success of Ph.D. students in Tanzanian universities. Past studies that applied this theory were based on secondary school and college students. Moreover, based on the author’s knowledge, this study is one of the early studies to systematically look into the role of personal values on Ph.D. students’ academic success. Thus, the study contributes to the existing literature on personal values and academic success because previous studies on this subject could not examine Ph.D. students’ success in isolation.
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    Performance Appraisal, Career Development and Employee Performance: Implications from Procurement Professionals
    (University of Dar es Salaam, 2023) Jaffu, R.
    This study examined the mediating role of career development on the relationship between performance appraisal and procurement professionals’ performance. The study involved 204 procurement professionals from Dodoma city. It used cross-sectional survey design, where data were analysed using Structural Equation Modelling (SEM). The findings indicate that procurement professionals’ performance and career development are positively influenced by performance appraisal practices. The study also found out that career development has positive influence on procurement professionals’ performance. Finally, the study revealed that career development mediates the influence of performance appraisal on procurement professionals’ performance. The results imply that; procurement professionals’ performance can be enhanced by performance appraisal practices through career development. By integrating performance appraisal, career development and procurement professionals’ performance, this study brings additional understanding in the human resource development body of knowledge in the context of procurement management.