In this study relevant products errors were determined with error probabilities, severity values, and values of discoverability were calculated at a knitting company by types of Failure Modes and Effects Analysis's (FMEA); process FMEA. Correction steps were determined with RPN (Risk Priority Number) values due to occured errors. According to the obtained results, it was determined that traces of platin, fly, broken needle, lycra eccentric, number of hole, transverse band, and lycra cut are the most critical errors. These errors have been occurred by knitting machines. Furthermore, workers education and improvment of working conditions critical factors on eliminating errors.