P PT Aditec Cakrawiyasa is one company engaged in the manufacture of household products, ie a gas stove with brands quantum. In producing the components of a gas stove, there is one component of a product which has the largest number of defects, it is a 22 Chimney Pipe. This is proved by company's historical data for period of October to December 2010, This is proved by company's historical data for period of October to December 2010, which has average of highest defects percentage in Chimney Pipe 22 at 0,284%. To decrease the value of defective percentage, companies need to improve product quality continuously. In quality improvement, research conducted by applying Six Sigma methods through the stages of DMAIC (Define, Measure, Analyze, Improve, and Control) and using Knowledge Map. The Selection of the production process chosen based on the percentage of defects, so that the process of Bending become the focus in the research. The company currently has a number of 1350 DPMO with sigma level of 4.5. To achieve an increase in sigma, it is necessary to further analysis and improvement of production processes. Analysis and improvements carried out by using the table Failure Mode and Effect Analysis (FMEA) to determine the cause of the failure to prioritize the handling of problems. Based on the results of this analysis, known to cause problems on the failure of Roll bending machine manual was worn out with RPN value of 256 Operators are less scrupulous and hurry with RPN value of 192, and No examination at the beginning of process with RPN value of 168. In the Improve phase, carried out making of Knowledge Map in order to accelerate the user or company obtain the necessary knowledge or information regarding the improvements that can improve the quality. Knowledge map in this study is based on the response of the FMEA table that has three highest RPN values that will discuss how to overcome failure wrinkled pipe, pipe bender, and the crooked pipe. Knowledge map in this study is based on the response of the FMEA table that has three highest RPN values that will discuss how to overcome failure wrinkled pipe, pipe bender, and the crooked pipe. Implementation of the proposed improvements for the company to replace the plastic that has been damaged, lubricate the roll bending segment, do the replacement with a new roll, do the smoothing (sanded) roll that is thirsty, give directions for the work of the operator, and Create a Standard Operating Procedure (SOP) sheets. After the proposed improvements are implemented then the obtained reduction in DPMO value becomes 565 with increased levels of sigma to 4.75 sigma.