Which one of the following is NOT a benefit that comes from reducing variation in a process?

Reducing variation in a process has multiple benefits that enhance performance and quality. One significant advantage is that capability improves, which means that the process can consistently produce outputs that meet specifications. Alongside this, the defect parts per million opportunities (DPMO) is often reduced, indicating lower rates of defects and higher overall quality. Additionally, decreasing variation typically leads to lowered costs linked to waste, rework, and inefficiencies in the process.

However, customer requirements changing is not a direct benefit of reducing variation. Instead, customer requirements are driven by external factors such as market trends, technological advancements, and competitive pressures rather than by the internal consistency of a process. Therefore, while improving a process to reduce variation contributes to stability and reliability, it does not inherently alter the foundational expectations or needs of the customers.