Compute

IT Resource Sub Tower	Definitions	Examples	Unit Cost Unit of Measure (standard) (see definition )	FTE Efficiency Unit of Measure (see definition )
Servers	Physical and virtual servers running a version of Microsoft's Windows Server operating system; includes hardware, software, labor and support services.	Windows Server 2k Red Hat Server	Logical Server	Number of logical servers per FTE for Server
Unix	Servers running vendor-specific, proprietary Unix operating systems; includes hardware, software, labor and support services.	IBM AIX Sun Solaris	Logical Server	Number of logical servers per FTE for Server
Midrange	Midrange covers proprietary servers that provide substantial distributed systems (on platforms such as Unisys or Tandem). The common theme is a distributed architecture and the ability to support multiple clients in parallel.	iSeries (AS 400) Tandem, DEC servers	Configured MIPS LPARS CPW	Number of configured MIPS per FTE for Midrange
Mainframe	Traditional mainframe computers and operations running legacy operating systems.	IBM mainframes running MVS, VM, OS/390, zOS, zLinux.Unisys mainframes	Configured MIPS	Number of configured MIPS per FTE for Mainframe

IT Resource Sub Tower	Internal/External Labor	Hardware	Software	Outside Services	Facilities & Power	Telecom
Servers	Systems analysts/engineers providing technical operations & support, Planning & Process Mgmt, Admin (including mgmt.)	Physical and logical servers including HW: chassis, power supply, CPU, memory, Internal storage, network cards, host adapters; SW: OS, virtualization & monitoring	O/S, Virtualization, Monitoring, Security	Managed Windows compute infrastructure services.	N/A (at the Tower Level, included in the technology services TCO)	N/A
Unix	Systems analysts/engineers providing technical operations & support, Planning & Process Mgmt, Admin (including mgmt.)	Chassis, power supply, CPU, memory, Internal storage, network cards, host adapters	O/S, Virtualization, Security, Mgmt & tools	Managed Unix compute infrastructure services.	N/A (at the Tower Level, included in the technology services TCO)	N/A
Midrange	Systems analysts/engineers providing technical operations & support, Planning & process mgmt, Admin (including mgmt.)	Chassis, power supply, CPU, memory, Internal storage, network cards, host adapters	O/S, Virtualization, Security, Mgmt & tools	Managed midrange compute infrastructure services.	N/A (at the Tower Level, included in the technology services TCO)	N/A
Mainframe	Systems analysts/engineers providing technical operations & support, Planning & Process Mgmt, Admin (including mgmt.)	Chassis, power supply, CPU, memory, Internal storage, network cards, host adapters	O/S, Virtualization, Security, Mgmt & Tools	Managed mainframe compute infrastructure services.	N/A (at the Tower Level, included in the technology services TCO)	N/A

IT Resource Sub Tower	Unit of Measure (standard)	Guidelines
Servers Unix	Logical Servers	An operating system image, partition or virtual server hosted on a physical server. OS Instances may be implemented using partitioning firmware (as provided on large Unix servers from Sun and IBM), or through third party utilities such as VMware or Microsoft. The term “VM” (Virtual Machine) has become common parlance for an “OS Instance” except that a physical machine with no VMs still counts as one OS Instance. Do not count firmware, stub operating systems, the ESX host or virtualizing software as a separate OS Instance. Include Disaster Recovery volumes For example, a hypervisor with 50 virtual machines would be counted as 50 OS Instances. Do not count the physical host hypervisor as a separate OS instance.
Mainframe Midrange	Total Configured MIPs	MIPS is defined as: Millions of Instructions per Second. A measure of the processing capacity of a mainframe or mid-range CPU. The practical maximum processing capacity of a partition, taking into account multi-processor overheads and the way that the mainframe has been configured. Midrange systems which are rated by IBM in CPWs, are converted to MIPS.

IT Resource Sub Tower

Unit of Measure (standard)

Guidelines

Servers

Unix

Logical Servers

An operating system image, partition or virtual server hosted on a physical server. OS Instances may be implemented using partitioning firmware (as provided on large Unix servers from Sun and IBM), or through third party utilities such as VMware or Microsoft. The term “VM” (Virtual Machine) has become common parlance for an “OS Instance” except that a physical machine with no VMs still counts as one OS Instance. Do not count firmware, stub operating systems, the ESX host or virtualizing software as a separate OS Instance. Include Disaster Recovery volumes

For example, a hypervisor with 50 virtual machines would be counted as 50 OS Instances. Do not count the physical host hypervisor as a separate OS instance.

Mainframe

Midrange

Total Configured MIPs

MIPS is defined as: Millions of Instructions per Second. A measure of the processing capacity of a mainframe or mid-range CPU. The practical maximum processing capacity of a partition, taking into account multi-processor overheads and the way that the mainframe has been configured. Midrange systems which are rated by IBM in CPWs, are converted to MIPS.