Maintaining service levels of existing IMS production systems

After your IMS system is installed, tested, and operational, maintain the service level of the IMS system by following the recommendations listed below.

Recommendations for all products that run on the z/OS platform:
- Upgrade RSU maintenance 4 times per year
- Monitor HIPER, PE, SEC/INT and FIXCATs regularly and install critical fixes as appropriate weekly or monthly
Recommendations specific to IMS production systems:
- Install fully tested fixes for significant¹ software problems encountered
- Install fully tested significant HIPER SYSMODs that are directly applicable to your specific IMS environment
- Install fully tested significant SYSMODs that resolve PE PTF's that are directly applicable to your specific IMS environment
- Review the IMS PSP bucket UPGRADE for the IMS release level and SUBSET FMIDs. Important IMS product-related information is continually added to these buckets that might require action

¹ Your shop determines the significance of a fix. If your shop cannot tolerate the possible consequences of not installing a fix, the fix is significant.