In many Irrigation Schemes, there is a difference between design assumption and operational reality. Investigating the current performance of water delivery schedules and operational realities are useful to find out and evaluate the major indicators based on design assumptions; and find out ways to mitigate the under performances of the scheme. This study was initiated to evaluate the performance of Aswa-Guder irrigation scheme using performance indicators such as conveyance efficiency, application efficiency, Storage efficiency, water delivery performance, maintenance indicators, water productivity and assessment of institutional perception. To achieve the research objectives, all required data were collected through structured questionnaires for household surveys, focus group discussions, key informant interviews, field measurements and literature reviews. The collected data were analyzed using empirical equations and statistical analysis in percentage basis. The results showed that the average conveyance efficiencies were obtained as 82.74%, and 71.80% in Main and Secondary canals respectively. The irrigation application efficiency results on three sample plots at Head, middle and tail reaches of the command area were found to be 48.23%, 54.53% and 68.75% respectively. The average storage efficiency of the fields was 64.73%. Based on the water delivery indicator analysis, the main canal water transport efficiency was found to be only 43.3% of its design. The irrigated agricultural performance; vis the outputs per unit command area and output per unit harvested area were found as $2,839.85 per ha and $3,042.7 per ha respectively. Water productivity indicators such as, Output per unit irrigation water supplied and Output per unit irrigation water delivered values of $0.34 per m 3 and $1.1 per m 3 in the scheme respectively. Based on the assessment of farmer’s perception about the performance of the irrigation scheme, the respondents believe that major problems that make the scheme to be inefficient was water shortage caused by water theft or unauthorized canal breaching in the scheme. All these showed that the scheme is performing below the intended level. Therefore, proper institutional setup, creating awareness for the users and upgrading needs to be in place and water user association should be empowered in order for it to discharge its responsibility and to achieve good performance of the scheme. Keywords: Aswa-Guder, Irrigation, Performance, Indicator, Efficiency