Which methodology focuses more on reducing variation within processes?

The methodology that focuses more on reducing variation within processes is Six Sigma. Six Sigma aims to improve process quality by identifying and removing the causes of defects and minimizing variability in manufacturing and business processes. It employs a set of quality management methods, statistical tools, and a structured approach to problem-solving that include the Define, Measure, Analyze, Improve, and Control (DMAIC) framework.

In contrast, methodologies like Lean are primarily focused on eliminating waste and enhancing process flow rather than directly addressing the variations in processes. Agile emphasizes flexibility and responsiveness to change, making it suitable for project management and software development but not specifically geared toward variations in process quality. Kaizen, on the other hand, centers on continuous improvement through small, incremental changes over time, which can contribute to variation reduction but does not specifically target it as its primary focus as Six Sigma does.

Therefore, Six Sigma stands out as the methodology most associated with reducing variation, making it the best answer for this question.