This thesis is to identify and evaluate effective delivery methods and assess their applicability to the local situations in the Oromia region of the West Wallaga Zone. The significance of the research is that the broadening of the service packages is believed to enable the optimization of the process and the product as a whole in the construction industry, as well as facilitate the development of the infrastructure sectors. The objective of this research is to identify effective project delivery methods for public works construction in the Oromia Region West Wallaga Zone. The data collection process used in the research had the option of two basic methods: primary data collection and secondary data collection. Accordingly, four project delivery methods based on their relevance to the local situation have been evaluated; their merits, demerits, and requirements have been identified. These methods are: the design-bid-build, construction managers (at resk and at fee), the design-build, and the design-build-operate-transfer methods. Based on these findings of the study, the design-bid-Build method has been the most widely used effective project delivery method in the Oromia Region West Wallaga Zone. Performance-based project delivery methods are thought to offer a way to develop the sector and to benefit all stakeholders. In order to benefit all parties involved in the building sector, this will serve as a beneficial addition to the current techniques.