The IBM License Metric Tool [ILMT] helps you maintain an inventory of the PVU based software deployed for your Full Capacity or Virtualization (Sub-) Capacity environment, and measures the PVU licenses required by software Product.
The use of IBM License Metric Tool is mandatory for use with PVU sub-capacity licensing.
Exceptions to the mandatory rule:
1. When ILMT does not yet provide support for the Eligible Virtualization Environment
2. If the customer has fewer than 1,000 employees and contractors, you are not a Service Provider (an entity that provides information technology services for end user customers and the total physical capacity of your Enterprise servers measured on a full capacity basis, but licensed under Sub-Capacity Licensing terms, is less than 1,000 PVUs.
Customers must maintain documentation for at least two years to demonstrate ongoing compliance with these Sub-Capacity Licensing terms.