The deployment architecture, along with additional details provided in implementation specifications, tells you which application components and which Java ES components are to reside on each computer in your physical environment. You use the Java ES integrated installer to install the appropriate Java ES components on each computer in your deployment architecture (see The Java Enterprise System Integrated Installer).
Your installation plan describes the sequence and scope of installer sessions. The approach you take to performing installation, however, might depend upon whether you are performing a new installation of Java Enterprise System, whether you are upgrading previously installed Java ES components, or whether you are replacing third-party components with Java Enterprise System. The last two of these Java ES adoption scenarios often require you to migrate data or application code to achieve compatibility.