Methods and apparatus for identifying the impact of changes in computer networks

The impact of device configuration changes on operational issues and policy compliance in a computer network can be discerned from a visual data presentation that jointly shows representations of changes, issues, and policy compliance in a common view for a group of network devices. Configuration information is collected from devices in the computer network and processed to determine whether a change has occurred in a configuration of any of the devices, whether any operational issues exist for each of the devices, and whether any of the devices are not in compliance with any applicable operational policies. A display device displays the visual data presentation to allow an operator to see trends and relationships between device configuration changes and operational issues and incidents of policy non-compliance. The visual data presentation can be depicted as a graphical timeline view, a network topology view, or a table view of the information.