<span lang="EN-GB">PT URW is a textile company that produces semi-finished fabrics with various types of fabric, one of which is X fabric. X fabric is produced by PT URW based on customer orders. The current problem is that in the period January to December 2020, X fabric has an average BS grade of 3.15% which exceed the specified tolerance limit that has been set, which is 2%. This research was conducted by observing the production process and conducting interviews with the parties involved. The purpose of this study is to implement the Six Sigma method to minimize defects in BS grade X fabric in the weaving process by identifying the root cause of the problem of picbar defects using Fishbone and Fault Tree Analysis (FTA) tools and providing suggestions for improvement using Failure Mode and Effect Analysis (FMEA). The concept of Six Sigma, namely define, measure, analysis, improve and control is used as a framework in the preparation of research. The Six Sigma method is also used to measure the Sigma Quality Level (SQL) based on the Defect per Million Opportunity (DPMO) value of the X fabric production process. The process sigma level for X fabric at PT URW is 3.0, this shows that PT URW is a company that is still developing and need improvement to improve the quality of the X fabric. The main cause of picbar based on 3 factors, namely machine, human and method factors. The failure mode with the highest RPN at 550 is that it machine cannot detect the pick sequence after the engine stops, so it is necessary to add an external tool that can detect the last pick before the jam occurs/turns off so that when the engine starts or runs again, there is no pick jump on the X fabric causing the picbar</span>