This work would not have been possible without help of many people whose assistance and opinions significantly improved the final result. It will be unfair if I would not give special thanks to my supervisor Mr. Bongole A.J from the University of Dodoma for his special contribution to this work. I would then like to acknowledge my fellow students for their advice and support during my study period. To all participants who took their time to participate and share their ideas concerning the study and experiences in response to variety of questions contained in the questionnaires. I also gratefully express my sincere gratitude to my parents because they are the ones who refunded me so as to make sure that I complete the study. I would like to thank all Wajasiliamali around Dodoma municipal for the generous support which made this report possible. I would like to gratefully acknowledge Masasi Lufungulo, Haruna Masenza, Almasi Diwani, Juma Mugumba and James Kalimanzila for their guidance in shaping this work and comments.