Migration Guide : 3. Upgrading from OpenROAD 3.5 : Summary of the OpenROAD 3.5 Upgrade Process
 
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Summary of the OpenROAD 3.5 Upgrade Process
The upgrade process consists of the following basic phases. Each phase is described in detail in the remaining sections of this chapter.
Phase 1: Prepare for the upgrade. Freeze the code line (apart from emergency fixes) as a final step.
Phase 2: Convert the applications, including resolving known issues.
Phase 3: Conduct acceptance testing.
Phase 4: Go live. Unfreeze the code line.