The Sub-capacity pricing option is available with the monthly license charge price metric Midrange Workload License Charge (MWLC) for zEC12, z196, z10 or z9 processors or Advanced Entry Workload License Charges (AEWLC) for z114 or zBC12 processors.
For sub-capacity pricing you need to run the Sub-Capacity Reporting Tool (SCRT) and submit a resulting SCRT report to IBM monthly. The input for SCRT is a VSAM dataset that contains SCRT89 records. Since z/VSE Version 4 and Version 5 you can produce SCRT89 records. For that purpose you have to activate the Capacity Measurement Tool (CMT) during z/VSE startup. SCRT89 records report sub-capacity MSUs (Million Service Units). Sub-capacity pricing is based on the four hour rolling average utilization of a z/VSE LPAR or z/VM guest. Sub-capacity products (such as VSE Central Function, CICS TS, VTAM, ...) are charged based on the four-hour rolling average utilization.
Since October a new release of SCRT is available for download. More information about sub-capacity pricing is here.
... or on our corresponding z/VSE web page - here.