Sub-Capacity Reporting Tool (SCRT)

The Sub-Capacity Reporting Tool (SCRT) is a no-charge IBM tool that analyzes a month of data for IBM zSystems™ environments and produces a sub-capacity report. The report indicates the required license capacity (in MSUs) of each IBM sub-capacity eligible product running on z/OS®, z/TPF, or z/VSE® systems.

Starting with SCRT V24 R11, SCRT has been enhanced to optionally support ISV products. This capability allows the ISVs customer to generate an SCRT report that reflects the peak rolling four-hour average (in MSUs) of the ISVs products in use. The generated ISV report includes all the This capability is embedded in the SCRT tool that the customer executes no special SCRT deliverable is required. The generated ISV report includes all the standard SCRT report sections report sections.

For more general information, see About the Sub-Capacity Reporting Tool.

Requesting Information on SCRT

ISVs who want to exploit this functionality with their own products, must license the SCRT ISV documentation. The SCRT ISV documentation explains how to create a product library file. The product library file can then be transmitted by the ISV to all participating customers, who use it with the standard SCRT deliverable (along with the standard SCRT inputs) to generate the ISV report. The SCRT ISV Documentation license agreement is provided at no charge for qualified ISVs.

In order to receive this document, the ISV must meet certain requirements.
For a list of the requirements, please send an email to with:

  1. SCRT Document as the subject
  2. Include in the body:
    • your company name
    • your name
    • your business phone number
    • your business email address


  • By sending the email you agree that IBM may use your personal information to contact you about the SCRT Document.

If you have any questions regarding SCRT, send us an email to