A retail company, with the goal of improving customer satisfaction, initiated a Six Sigma Green Belt project led by Andrew. The project involved optimizing the return process for online purchases. After implementing improvements in the Improve phase, the project is moving into the Control phase. What is a critical task that Andrew should undertake during the Control phase to ensure the sustained benefits of the project? Question 12 options: Document the improvements made in a final report for management Initiate a new project to address a different aspect of customer satisfaction Train the customer support team in new procedures to handle returns Discontinue the project as the improvements have been made Monitor key performance indicators related to the return process to ensure ongoing improvement