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A process map is a valuable visual tool used in various stages of process improvement within Six Sigma methodologies. While it serves multiple purposes, it does not specifically help in determining sigma values directly.

The process map serves as a training and orientation tool, allowing team members to understand the workflow and responsibilities clearly. It also aids in identifying when and where to collect data because it outlines the steps in a process, highlighting critical input and output points. Additionally, process maps are instrumental in identifying non-value-added activities by making it easier to visualize the flow of activities and pinpoint areas that do not contribute to customer value, thereby enabling teams to target waste reduction.

However, determining sigma values involves statistical analysis and calculations based on process performance data rather than simply visualizing the process flow. This calculation requires a different set of tools and methodologies focused on quantifying process capability and performance. Thus, while process mapping contributes significantly to understanding and improving processes, it does not directly determine sigma values.