Quality time - Six sigma for software

As software engineers redesign processes in line with Six Sigma, they can implement controls that take advantage of the improvement zone between 3σ and 6σ process performance. By building critical customer metrics into software solutions, they can make applications self-correcting by enabling specific actions when process defects surface in the improvement zone. The point is not to build software without defects but to prevent software from producing defectives in spite of their defects.