Background: Strengthening Laboratory Improvement Process Towards Accreditationrnrecognizes laboratories where they are in the process of quality improvement; through audits andrndirect on technical assistance.rnObjective: The aim of this study was to assess the implementation progress of SLIPTA inrnselected public health laboratories in Addis Ababa, Ethiopia.rnMethods: Retrospective study design was used to assess the implementationrnProgress of SLIPTA in 31 public health laboratories in Addis Ababa, Ethiopia. The facilitiesrnwere selected using convenient technique. Their implementation status was assessed usingrnSLIPTA standard checklist, and a semi-structured questioner to identify factors that affect duringrnthe implementation phases. The current and the last audit scores of the facilities had comparedrnagainst the SILPTA score level. This study wasconducted from Marchto August 2015.rnResults: This finding indicated that number of laboratory those have zero star level decreasernfrom nine to three,Number of health facility in 2013 those are13(41.9%),6(19.35%) andrn3(9.67%), have 1,2,3 stars levels respectively, result of 2015 audit shows presence of goodrnSLIPTA progression than two years ,(number of lab 5(16%) have 4 star,[8(32%),3] andrn[11(29%),2], only one lab have 5 star,2(6%) have one star and 3(13%) have zero star level. Thernaudit finding shows that assessed in 2013 and 2014 before the current audit) was 71(27.5%)rnpoint score zero stars to 207(80.3%) point score three stars and 85(33%) point score zero stars torn246(95.6%) point score five stars , respectively from a possible 258 points.There were havernregular follow up on LQMS implementation activities in the laboratory, make goodrncommunication with laboratory staff, having financial Support, facilitation of training programrnandhire additional staff had an impact on having good progress on SLMTA implementation. Andrnalso, here was challenge to implement the system like staff turnover;staff resistance andrnmisunderstand of the system.rnConclusion: Improvements were seen with 31public health laboratory which in level of star scorernand each quality essential element