Process analysis is a business analysis technique that benefits from frameworks and methodologies like Six Sigma and Lean. These methodologies are focused on improving processes by eliminating waste and reducing variation. Six Sigma uses a set of quality management methods, including statistical tools, and creates a special infrastructure within the organization (champions, Black Belts, Green Belts, etc.) who are experts in these methods. Lean, on the other hand, is centered around providing value to the customer by optimizing processes, reducing waste, and improving flow. Both methodologies are process-centric and align with the goals of process analysis, which aims to understand and document the current process and design an improved future state.