User Guide : Best Practices : Optimize and Harden the Solution : Iterate
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Even after you move a completed solution to production, it must be maintained over time. The optimize-test-debug-iterate pattern continues for the life time of that integration.
You must refactor and modernize the integration periodically by accounting for new versions of applications, databases, and operating systems. Many factors impact the integration middleware that must be addressed.
During each refactoring and update phase, repeat the entire process and use the described techniques to help facilitate those changes. If you follow the steps correctly, you will be able to design and deploy successful integrations on your own.