Background: In Mettu Karl Referral Hospital, long waiting time of registration until tornconsultation with physician is one of the most problems. Because Patient spend substantialrnamount of time to get service delivered by health professional in outpatient department of thernHospital.rnObjective: The overall objective of the project is to reduce outpatient long waiting time fromrn128 minutes to 85 minutes and increase customer satisfaction from 5.8 scales to 7.0 by the end ofrnJune 2019. rnMethod: A pre-post interventional study was conducted at Mettu Karl Referral Hospital, fromrnMarch to June 2019 G.C with sample size of 400 OPD patients both at pre and post interventionrnperiod and data was collected by using hospital performance monitoring and improvementrnmanual (HPMI) checklist and all steps of strategic problem solving methods from EthiopiarnHospital Reform Implementation Guide (EHRIG) standard was used and the real root causes ofrnoutpatient long waiting time to consultation and low patient satisfaction in OPD identified were,rnlong registration process and late starting clinic on time. Accordingly, re-arranging thernregistration process to reduce long process and awareness creation and discussion with physicianrnwas undertaken as an intervention, and data was entered and analyzed by using StatisticalrnPackage for Social Science Version 21 software. Descriptive analysis was used and results werernpresented in narration, graph and table.rnResult: Patient waiting time and customer satisfaction improved based on pre and postrnintervention comparisons. Patient waiting time was 128 minutes before intervention andrndecreased to 83.5 minutes and the success rate of patientsâ€Ÿ satisfaction increased from 58 % torn71% respectively after intervention.rnConclusion and Recommendation: Committed management of arranging registration processrnuntil get physician and satisfaction of participants were the process could be effective to improvernunnecessary waiting time in the hospital and continuous provision of follow up resulted inrnsignificant progress. Proper implementation and strong follow-up should be strengthened and thernsignificant support from hospital leadership should be provided.