Productivity rate means the number of products produced for a specific amount of time. For an Industry to meet the customer demands on time, the productivity rate should be high. This research paper deals with the application of the 8D methodology for increasing the productivity by reducing the cycle time of the process in a wheel and rim assembly line. The 8D methodology is problem-solving eight disciplinary methods which help in identifying, analyzing, providing solutions and eliminating the reoccurrence of the problems. This paper deals with identifying the root cause of the problem and providing the solutions and also to prevent reoccurrence of the problem. This paper also deals with Value Stream mapping and Cause and Effect Diagram for analyzing the problem. This methodology helps to identify and solve the problem through the simplest approach by a step by step procedure.