Producing quality product is one of the major determinants that enable manufacturing organizationsrnto compete in the global market. There are many causes for the occurrence of defective products.rnHence, to avoid any further problem corrective measures should be taken. The main objective of thisrnthesis is to develop a continuous quality improvement model that integrate lean and six sigma, whichrncoherently applies the principles to reduce the defect level in Abyssinia Tannery Industries. The casernstudy is mainly based on primary and secondary data sources and the main secondary data sources arerncompany record, reports and literature review. Data collected from primary data sources are processrnflow, cause of defects and type of defects. And frequency of occurrence of defect, amount of lowgradernlevel,rndefect,rntheirrnimpact,rnwhichrndefectrnaffectrntherncompanyrnmostrnandrncostrnencoredrntorntreatrnthernrndefectivernrnone etc. were collected from secondary sources. In addition, both qualitatively andrnquantitatively methods used to analyze the data and by using lean and six sigma tool and techniques.rnThe proposed structure is built upon the existing deï¬ne, measure, analyze, improve and controlrnstructure, which is well renowned in the literature. There are multidimensional causes related tornhuman, machine, material, method, process and organizational factors for the occurrence of defect.rnTo solve the problems associated with these causes, proactive, organized and continuous qualityrnimprovement model is required. To improve the quality by reducing defect, Integrated Continuousrnquality Improvement model consisting lean and six sigma developed based on case study result. SixrnSigma and lean are related and share common grounds in terms of striving to achieve customerrnsatisfaction. The integration between the two approaches is lean within six-sigma type of integrationrnand use design of experiment and future value stream mapping for improvement purpose. Theirrnintegration is concluded to be possible and beneï¬cial for defect reduction in Abyssinia tannery