Companies can measure the effectiveness of their DEI events by collecting feedback from participants and evaluating how those events impacted employee engagement and morale. Additionally, companies should measure the diversity of their workforce before and after the event to ensure that they are making progress in hiring and promoting employees from diverse backgrounds. Finally, companies should also track metrics such as performance reviews, promotional rates, and attrition rates to determine if the DEI events are helping to create a more equitable and inclusive workplace.