In a financial firm, a senior manager is responsible for overseeing a group of investment analysts. During a quarterly review, the manager discovers that one of the analysts has been making recommendations based on outdated research reports that were improperly vetted. The manager has received several complaints regarding the quality of analysis provided by this analyst. According to the CFA Institute Code of Ethics and Standards of Professional Conduct, particularly regarding the duty of supervision, how should the senior manager proceed in this situation?