China Labor Watch, a New York State–based NGO, reported that "three to four thousand" Foxconn workers who work at the iPhone 5 production plant in Zhengzhou stopped working on October 5, 2012. The strikes occurred after Apple implemented a stricter quality standard on their products, which includes a 0. 02 mm restriction on indentations inflicted during production, and imposed demands related to scratches on frames and back covers. The strikes were also attributed to the employer forcing employees to work on a public holiday. The report stated training was inadequate for quality demands expected and led to employees producing products that did not meet standards. During the strike, conflicts between quality control inspectors and employees resulted in brawls. China Labor Watch also claimed that concerns raised by inspectors were not addressed by factory management. Foxconn spokesmen admitted that a micromanagement problem exists, but also said that there were only 300 to 400 workers absent and the conflicts did not influence production processes. In November 2012 Foxconn chairman Terry Gou reported that the delay in production was due to undisclosed difficulties in assembly.