Design/change-time policies specify a set of actions that are to be executed when a specified event occurs to an instance of a specified object type. You use design/change-time policies to customize the behavior of CentraSite when certain events occur on assets and other objects in the registry (for example, during creation, modification, and/or deletion events). You can use design/change-time policies to perform tasks such as obtaining approvals, executing automated tests, issuing notifications, and imposing organizational standards when assets or other objects are created, modified, or deleted.