Package Configurations Organizer
Use the Package Configurations Organizer dialog box to enable package configurations, view a list of configurations for the current package, and specify the preferred order in which the configurations should be loaded. If multiple configurations update the same property, values from configurations listed lower in the configuration list will replace values from configurations higher in the list. The last value loaded into the property is the value that is used when the package runs. Also, if the package uses a combination of direct configuration such as an XML configuration file and an indirect configuration such as an environment variable, the indirect configuration that points to the location of the direct configuration must be higher in the list.
When package configurations load in the preferred order, configurations load from the top of the list shown in the Package Configuration Organizer dialog box to the bottom of the list. However, at run time, package configurations might not load in the preferred order. In particular, Parent Package Configurations load after configurations of other types.
Package configurations update the values of properties of package objects at run time. When a package is loaded, the values from the configurations replace the values that were set when the package was developed. Integration Services supports different configuration types. For example, you can use an XML file that can contain multiple configurations, or an environment variable that contains a single configuration. For more information, see SSIS Package Configurations.