Recommended Service for z/OS

Describes Broadcom Recommended Service for z/OS.
Recommended Service for z/OS (
) is an important part of a good preventive maintenance philosophy for
mainframe products that provides more flexibility and granular application intervals.
helps reduce the risks that can occur when applying preventive maintenance and can reduce the chance of encountering a PTF-in-error (PE) both of which result in a more stable system.
The monthly
levels provide the optimal cadence to match with your preventive maintenance schedule whether it is monthly, quarterly, bi-yearly or annually. The wait time for PTFs, HIPERs, and PRPs to be included in a monthly
level is from 30 to 60 days, which includes new products and releases. Monthly
levels are tested against IBM quarterly RSU levels and deliver the granularity that is necessary for you to choose the number of months of PTFs, HIPers, and PRPs to apply.
The selection process for PTFs, HIPERs, and PRPs in a
level is the same:
  • PTFs, HIPERs, and PRPs published this month are tested in the next month, and then made available.
  • All maintenance is tested for the same amount of time.
Each new
level PTF list is made available on a monthly basis and includes the following elements:
  • PTFs
  • HIPERs (High Impact or Pervasive PTFs)
  • PRPs (PTFs that resolve PE PTFs)
To receive automatic notification of new
levels, join a Mainframe Software community and sign up to receive notifications when posts are made and/or follow us on Twitter. We also recommend that you sign up for notifications on
Broadcom Support
(under your account select Subscriptions). Select the alerts that you want, and then select
In support of
created a z/OS-based Integrated System Test (IST) lab for the continuous testing of PTFs for our mainframe products. The IST lab runs all supported releases of the IBM z/OS operating system and multiple releases of popular IBM subsystems (CICS, DB2, IMS) that are maintained at the latest IBM quarterly recommended service upgrade (RSU) levels. For more information, see the Integrated Systems Test Lab Release Grid.