A process improvement team will be most effective if it includes which of the following...

The correct answer is A. Key stakeholders and process owners . In the CSSBB body of knowledge, effective Six Sigma projects depend on involving the people who are directly connected to the process and who are affected by the improvement effort. The CSSBB material states that during project preparation, organizations should identify and involve parties affected by the planned changes; these parties are called stakeholders . It also identifies process owners as one of the major Six Sigma roles, emphasizing that they have direct responsibility for the process and are essential for sustaining gains after improvement.

This makes key stakeholders and process owners the strongest team composition choice because they bring practical process knowledge, authority over implementation, and ownership of long-term control. By contrast, management representatives or executive leaders may provide support, but they are not usually the most effective core team members for day-to-day problem solving. External subject matter experts can be helpful resources, but they are generally supplemental rather than central. A strong process improvement team is most effective when it includes those who know the process best and will live with the results.