RefreshPac is a software preventive service offering that is available worldwide for a fee. RefreshPac can update one or all target and DLIB zone pairs residing in a target and DLIB consolidated software inventory (CSI). These zone pairs must belong to the same system release identifier (SREL). RefreshPac is customized by providing input from the customer in the form of a copy of the CSI information that the target and DLIB zone pairs to be serviced resided in. Upon delivery of the RefreshPac, you are entitled to selective follow-on service (SFS). SFSs contain PTFs that fix PE and HIPER fixes that are discovered after the package was shipped to you. By applying SFSs repeatedly, HIPER and PE fixes are flushed out of your system, thus providing a highly available system for your applications.