IBM® strongly recommends that you select, during order entry, the optional follow-on services (SFSs) that come with the SystemPac. SFSs contain critical service information: PTFs that resolve PEs and HIPERs that are discovered after your system is built. The SFSs you get are tailored to the image of the SMP/E CSI of the system that IBM shipped to you earlier. By installing repeating SFSs (at most 90 days apart, maximum of three), you stabilize the system you installed, thus enabling you to have a system with higher availability for your applications.

SFSs can be installed by way of the CustomPac Installation Dialog or batch JCL.