Workplace is one of the prime important places which decide productivity of any industry whether it is micro, small, medium or large scale. To gives best working conditions, the productivity of the company will be increased and also sustain in the global market. The 5S methodology is one of the best workplace organization techniques which make the workplace in such a way that the working conditions become best. The 5S methodology permits to analyze the processes will identify and remove the unnecessary product, tools, and general clutter; and also it will further encourage the development of new layouts, better storage systems, and new better methods for identifying the correct parts. This case study deals with the 5S implementation in an industry of OK plastics public limited company, which is located in Addis Ababa, Ethiopia. This paper explains the methods and techniques of 5 S use to increase the performance of all processes in the company. After implementation of 5s, it can be observed that introducing the 5S rules bring the great changes in the company, increasing the efficiency and effectiveness of the processes, improvement of the layout, productivity, improve the quality, and working conditions in the company