Promoting a preparation across environments
The best practice when using Talend Data Preparation is to set up one instance for each environment of your production chain.
Talend only supports promoting a preparation between identical product versions.
To promote a preparation from one environment to the other, you have to export it from the source environment, and then import it back to your target environment.
For the import to work, a dataset with the same name and schema as the one which the export was based on must exist on the target environment.
Let's take the example of a simple preparation, used to remove invalid values and formatting errors from an Excel file containing customers data. This preparation is saved as customers preparation.
![](/en-US/data-preparation-user-guide/7.3/Content/Resources/images/promoting_across_environments_1.png)
The following procedure will detail how to export this simple preparation into a file that can be reimported to a new environment.
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