The most critical element and labor-intensive aspect of application virtualization is sequencing—the process of converting an application installation into a virtualized application package. The success of application deployment is tied to the quality of the sequenced applications. For detailed information about planning and sequencing application, see Microsoft Application Virtualization Sequencing Guide 4.5. This guide contains step-by-step instructions, best practices, and guidance for advanced scenarios (OSD scripting, sequencing web applications, and so on). It is published by Microsoft Services and includes technical insight derived from field use.