Key fact: ITIL is a framework, not a standard.

A broad framework of general ITSM guidance that's concerned with practices, not processes, ITIL is industry "best practice" for IT support.

Its processes are basic, so ITIL accreditation is available only for IT practitioners and ITSM tool software companies. Accreditation for individual organisations would lack substance.

ITSM tool accreditation

For tools, accreditation confirms that a range of functionality is present required for the process to work in practice, including configurability and interoperability with other ITIL processes. Accreditation confirms that a tool is "fit for use".

The criteria is not part of ITIL. It is what software companies have independently determined is necessary for their product to be useable, viable, and sellable.

Accreditation is particularly beneficial for new ITSM software entering the market, and is generally beneficial for reassurance when an organisation is considering any tool.​

PeopleCert does not share the criteria. There is no need to because it is impossible for a basic process to work much better just from non-standard functionality being added on top.

For a basic process to work well, to be "fit for purpose", the process itself must be improved. Intentionally, ITIL leaves the question of how down to individual organisations.
 
Tool configuration for ITIL success
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Enabled by standard tool functionality (whether ITIL accredited or not), most ITIL processes can be made fit for purpose through a combination of configuration, standard operating procedures being established, and sometimes tool integrations and other add-ons.

For Incident and Request Management though, this is not so. Flow Management is required.