The ratio of emergency fixes to total changes is the best metric to determine if the change management program is performing as expected, because it reflects the quality and stability of the changes that are implemented in the production environment. A high ratio of emergency fixes to total changes indicates that the change management program is not effective, as it means that many changes are causing problems or failures that require urgent correction. A low ratio of emergency fixes to total changes indicates that the change management program is effective, as it means that most changes are well-planned, tested, and approved, and do not cause significant disruptions or defects. The ratio of emergency fixes to total changes can also help identify the root causes of the problems, the gaps in the change management process, and the areas for improvement. For example, if the ratio of emergency fixes to total changes is high, it may indicate that the change management program has issues with the following aspects: - Change request and approval: The change management program may not have a clear and consistent process for requesting, reviewing, and approving changes, or the process may not be followed by all stakeholders. - Change impact analysis: The change management program may not have acomprehensive and systematic method for assessing the potential impact of the changes on thebusiness processes, the IT systems, the users, and the customers. - Change testing and validation: The change management program may not have adequate testing and validation procedures to ensure that the changes meet the requirements and specifications, and do not introduce errors or vulnerabilities. - Change communication and training: The change management program may not have effective communication and training strategies to inform and educate the affected parties about the changes and their implications. - Change implementation and monitoring: The change management program may not have proper implementation and monitoring plans or tools to ensure that the changes are executed smoothly and successfully, and that any issues or incidents are detected and resolved promptly. Therefore, the ratio of emergency fixes to total changes is the best metric to determine if the change management program is performing as expected, as it can provide valuable feedback and insights for the change management program and its improvement. References = How to Measure Change Management Effectiveness: Metrics, Tools & Processes1, Metrics for Measuring Change Management2, Driving Value with Change Management Metrics3, Must-Know Organizational Change Management Metrics