5.    Install the prerequisite software. The previous table provides references to documents that can assist you. Installing with Tivoli Software Installation Service The Software Installation Service (SIS) can install multiple Tivoli products on multiple systems in parallel. This Java-based product can, therefore, install more products on more systems in much less time than the Framework’s installation facility. SIS performs product prerequisite checks and, if defined, user-specified prerequisite checks, ensuring as few installation failures as possible. In most cases, failures occur only when machines are turned off or removed from the network. SIS also creates an  installation repository  (IR) into which you can import the installation image of one or more Tivoli products. You can import only those interpreter (operating system) types needed in your environment, which saves disk space and processing time. The IR then becomes the source of all your Tivoli installations. You can even share a single IR across multiple Tivoli management regions. See the  Tivoli Software Installation Service Users Guide  for instructions on how to install SIS in your Tivoli environment and how to install products using SIS. Installing the Application Management Toolkit You can install the Application Management Toolkit software from the Tivoli desktop or from the command line. The following table provides the context and authorization role required for this task: Activity Context Authorization Role Installing Tivoli SecureWay Application Management Toolkit Tivoli management region install_product  or super Before Installing the Toolkit 7 Tivoli®  SecureWay Application Management Toolkit Guide