Abstract. Lean manufacturing is a concept of eliminating waste and non-value-added activities or process by using different lean tools or techniques. In developing countries, many organizations are implementing lean production to make a continues improvement in their business process. The aim of this thesis work is to investigate the lean practices and their extent by administrating with several lean manufacturing model case studies in the Bangladeshi textile industries as well as other countries using secondary data and observations. This work discussed the model case industry especially from Bangladesh also India, USA. In the beginning, there has discussed the lean thinking and the origin of lean, principles of lean, different lean tools, the critical success factors and so on. The study shows the potential improvement after lean Implementation by analyzing the production processes of the case industries. The most important findings of this study refer that the selected case industries are implementing a variety of lean tools but mostly in use is Six sigma, Value stream mapping (VSM), 5S, Visual management, Just in time (JIT),Kanban, Kaizen, Poka-yoke, Visual controls and Quality circle to improve their production processes. Also marking out some findings of different kind of benefits that are getting the industries of Bangladesh by implementing lean, some impeding factors, as well as different supporting factors, are also identified
