What is the sigma for 111111 defects per million?

To calculate the sigma level for 111,111 defects per million opportunities (DPMO), you first convert the DPMO to a proportion by dividing by 1,000,000, resulting in 0.11111. The corresponding sigma level for this defect rate is approximately 2.3 sigma, indicating that the process is not very capable and experiences a high rate of defects. In Six Sigma terms, processes are typically considered acceptable at 3.4 DPMO, which is around 6 sigma.