This document discusses best practices for deploying customizations from a source Microsoft Dynamics AX 2012 environment to a target environment. It recommends exporting the entire model store from the source environment to minimize downtime during deployment. It describes initializing the target environment by importing the model store from the source, ensuring the source is ready for export by granting permissions and recompiling, and provides steps for exporting from the source, preparing and importing into the target, and finalizing the deployment.