Lean focuses on removing many forms of waste, allowing Six Sigma to concentrate on reducing what?

Lean methodology is primarily concerned with the identification and elimination of waste in processes, which includes various forms such as excess inventory, unnecessary steps in workflows, and defects. This focus on efficiency creates a streamlined and optimized environment. Six Sigma, on the other hand, complements Lean by concentrating specifically on reducing variability in processes.

Variability can lead to inconsistent quality, errors, and inefficiencies in production or service delivery. By addressing this variability, Six Sigma aims to improve stability and predictability in processes, enhancing overall quality. This focus on minimizing variability is crucial because it ensures that outputs are consistently aligned with customer requirements and expectations, ultimately leading to increased customer satisfaction.

While the other options mention important aspects of process management, they do not accurately reflect the primary goal of Six Sigma in relation to Lean. For example, reducing costs can be a result of improved processes but is not the specific focus of Six Sigma, which is primarily about quality and consistency. Similarly, training and redundancies can play a role in organizational effectiveness, but they do not encapsulate the essence of Six Sigma's approach to process improvement.