In addition, the Capacity Provisioning Control Center must be downloaded from the host and  installed on a PC server. This application is used only to define policies. It is not required for  regular operation. Customizing the capacity provisioning function is required on the following systems: These systems are where the Capacity Provisioning Manager is running, or to which the  server can fail over after server or system failures. These systems are in one or multiple sysplexes that are to be monitored. For more  information about the capacity provisioning domain, see 8.8, “Nondisruptive upgrades” on  page 320. Concurrently installing temporary capacity by ordering On/Off CoD is possible in the following  manner: The use of the capacity provisioning function requires the following prerequisites: GLYPH<SM590000> TCP/IP connectivity to observed systems GLYPH<SM590000> RMF Distributed Data Server must be active GLYPH<SM590000> CIM server must be active GLYPH<SM590000> Security and CIM customization GLYPH<SM590000> Capacity Provisioning Manager customization. GLYPH<SM590000> Observed z/OS systems GLYPH<SM590000> Runtime systems GLYPH<SM590000> CP features equal to the MSU capacity of installed CPs GLYPH<SM590000> IFL features up to the number of installed IFLs GLYPH<SM590000> ICF features up to the number of installed ICFs GLYPH<SM590000> zIIP features up to the number of installed zIIPs GLYPH<SM590000> SAPs up to two for all CPC drawer capacities GLYPH<SM590000> By increasing the number of CPs.  GLYPH<SM590000> For subcapacity models, capacity can be added by increasing the number of CPs,  changing the capacity setting of the CPs, or both. The capacity setting for all CPs must be  the same. If the On/Off CoD is adding CP resources that have a capacity setting different  from the installed CPs, the base capacity settings are changed to match.  8.5.3 Ordering – The number of CPs cannot be reduced.  – The target configuration capacity is limited to the following amounts:  GLYPH<129> Twice the currently installed capacity, expressed in MSUs for CPs. GLYPH<129> Twice the number of installe d IFLs, ICFs, and zIIPs (the number of extra SAPs that  can be activated is two). For more information, see 8.2.1, “Upgrades” on page 288.  On/Off CoD can provide CP temporary capacity in the following ways: On/Off CoD includes the following limits that are associated with its use: On/Off CoD can be ordered as prepaid or postpaid. A prepaid On/Off CoD offering record  contains resource descriptions, MSUs, several speciality engines, and tokens that describe  the total capacity that can be used. For CP capacity, the token contains MSU-days. For  speciality engines, the token contains speciality engine-days. 304  IBM 14 Model ZR1 Technical Guide