This main concern of this study is to improve the productivity of the factory by LEANrnapproach. The purpose of lean in production is to increase productivity, improve productrnquality, reduce lead time and eliminate manufacturing waste. The study has been conducted onrnC&H Garment factory that produces different menâ€™s and womenâ€™s garment products, locatedrnin Bole Lemmi industry park Addis Ababa. rnOn an earlier stage, a literature review on lean was conducted, from the creation of the conceptrnof LEAN to its main tools and techniques. Valuable data has been collected from the case studyrn(C&H Garment Company) by observation, and interview from management body. Therncollected data has been analyzed according to the relevant time. For this purpose MS-excel,rnstatistical tools, MS-Visio have been applied; in addition to these, industrial or lean tools werernconsidered. rnrnThe research approach considers the existing factory manufacturing culture and the lost eventsrnwith respect to lean tools and techniques, to determine the lean tool gap the main waste of leanrnare identified with case company. Besides waste of lean absenteeism is one crucial event onrnfactory productivity, included on study.rnrnFinally, lean productivity improvement methods were propose. But in practical validation ofrnlean tool 5why methods have been exercised to improve rework and defects , based on thernaverage defect rate ,production rate, cycle time, production costs were improve byrn40.91%,50.85%,13%,40.91%, respectively. Cellular manufacturing and other approaches havernnot been implemented, although the company has been left prepared for an implementation inrnthe future.