What Is IT Service Management (ITSM)? Why Finding a Formal ITSM Definition Is Now So Hard

I didn’t realize until recently that it’s now difficult to find a formal definition of IT service management (ITSM). I already knew that ITIL no longer provides an ITSM definition – and I’m sure I’ve frequently used the ITIL v3 (2011 Edition) definition over the last two decades.

Why a Credible ITSM Definition Matters

So, where can you go to find a formal ITSM definition? And by formal, I mean one that you can quote without people taking issue with it, thanks to the nature of its source. We can all use ChatGPT to write something, but it’s good to say something and know that it’s credible and quotable.

Where Should You Look for an Official ITSM Definition?

As I’ve already mentioned, the ITIL body of ITSM (now service management) best practices has always been a great source for an ITSM definition. But, as we found out with the release of the first ITIL 4 Foundation publication in 2019, there’s no longer an ITIL definition of ITSM.

The ITIL 4 Definition of Service Management (But Not ITSM)

If you look at the ITIL 4 Foundation publication, service management is defined as:

“A set of specialized organizational capabilities for enabling value for customers in the form of services.”

But there’s nothing between IT service and ITIL in the ITIL 4 Foundation glossary, i.e. no ITSM definition is shared.

How to Define ITSM

I’ve known of this absence for years, but I hadn’t considered the impact on people who might want to include such a definition in something they’ve written or plan to present.

So when I needed to provide a “credible” definition recently, I went through the usual suspects, including what’s included on the ITSM.tools website. We state that ITIL defines ITSM as “The implementation and management of quality IT services that meet the needs of the business.”

I then Googled this to find the source, but with no success. I can only assume that this was the now-lapsed ITIL v3 definition.

Although I still like my personal definition, “Improving business performance through better IT delivery,” I don’t consider it “credible.”

So, where should one look to get a formal ITSM definition?

Looking Beyond ITIL for an ITSM Definition

Here are some of the places I looked for a solid ITSM definition:

• Gartner
• Forrester
• IDC
• ISO/EC 20000
• COBIT
• IT4IT
• VeriSM
• FitSM.

I also posted on LinkedIn, hoping that someone would help me find what was becoming an elusive ITSM definition.

The following explains what I found.

Do Analyst Firms Define ITSM?

First off, I’m not a subscriber to Gartner, Forrester, or IDC research. So, I could very easily be wrong here.

Gartner Research on ITSM

The Gartner Glossary states that: “IT Service Management (ITSM) Tools enable IT operations organizations, specifically infrastructure and operations (I&O) managers, to better support the production environment. ITSM tools facilitate the tasks and workflows associated with the management and delivery of quality IT services.”

Source:

However, ITSM itself is not defined.

Forrester Research on ITSM

Forrester Research also has a publicly available glossary. However, this also doesn’t offer an ITSM definition (and a search for “Forrester ITSM definition” took me to something I wrote in 2012 https://www.forrester.com/blogs/12-03-30-defining_it_service_management_or_is_that_service_management/ (and yes, I don’t spell my name like that)).

IDC on ITSM

Finally, with IDC, I couldn’t find a public glossary, let alone an ITSM definition.

Of course, as I said earlier, I could be wrong, and an ITSM definition could exist that’s only for clients (with all three analyst firms).

Can ITSM Bodies of Knowledge Provide an ITSM Definition?

ITIL aside, the go-to frameworks, methodologies, or standards for ITSM (or service management) are, in my opinion (and this is lifted from the ITSM.tools ITIL page):

• COBIT – “A framework for the governance and management of enterprise information and technology, aimed at the whole organization.”
• FitSM – A free “lightweight” standard for ITSM.
• ISO/IEC 20000 – An international standard to “establish, implement, maintain, and continually improve a service management system.”
• IT4IT – A “tool for aligning and managing a Digital Enterprise.” It’s an Open Group standard.
• VeriSM – “A service management approach for the digital age that helps service providers to create a flexible operating model to meet desired business outcomes.”

But again, finding a formal ITSM definition is difficult.

ISO/IEC 20000 Focuses on Service Management

ISO/IEC 20000 felt like a winner – I even bought the latest version of the standard to get it – but there was nothing, given that it focuses on service management (the very knowledgeable and ISO player James “fingers in lots of pies” Finister confirmed this for me).

COBIT, IT4IT, and VeriSM

Using Google search and ChatGPT for COBIT and IT4IT, I also found nothing definitive. I don’t have access to the latest versions of these bodies of knowledge, so again I could be wrong.

I went to the VeriSM website. I couldn’t get to what I wanted, though, so I messaged Claire Agutter, the brains behind VeriSM. She kindly confirmed that there’s only a service management definition (as they deliberately stayed away from the “IT” bit in VeriSM): “The management approach adopted by an organization to deliver value to consumers through quality products and services.”

Claire also added that her SIAM glossary includes only a definition for service management: “The management practices and capabilities that an organization uses to provide services to consumers.”

FitSM: The Only Clear, Formal ITSM Definition So Far

However, I struck gold with the FitSM Overview and vocabulary PDF. This defines ITSM as the:

“Entirety of activities performed by an IT service provider to plan, deliver, operate and control IT services offered to customers

Note: The activities carried out in the ITSM context should be directed by policies and structured and organised by processes and supporting procedures.”

Source: https://www.fitsm.eu/download/1660/?tmstv=1766072128

But, sadly, so many people haven’t heard of FitSM. It’s not a quotable source in my opinion.

I told you, finding a formal ITSM definition is hard these days.

What the ITSM Community Says When Formal Definitions Fail

When I realized that finding an ITSM definition isn’t just an “Is it me?” problem, I turned to LinkedIn for help, posting, “Have you tried to find a good formal definition of #ITSM recently?”

Practitioner Definitions from the ITSM Community

I received a couple of answers, although they aren’t “formal” in terms of being lifted from a “credible publication”:

• “Managing IT as a business in support of a business.”
• “The structured approach to delivering IT services that create measurable value for the customer designed by the customer, for the customer, and focused on generating meaningful business impact.”

Mark Smalley’s Perspective on ITSM’s True Scope

Mark Smalley kindly chipped in too, offering up his definition from his Reflections on XLA publication:

• “IT service management aims to ensure that the right IT services are agreed, that all involved parties are aligned with the agreed services, and that the parties collaborate effectively.
• IT service management’s positioning in the IT organization is distinct from but related to the other major IT domains: application development and management, infrastructure engineering, and IT operations.
• In terms of activities, IT service management encompasses the engagement between service provider and recipient, the preparation of necessary resources, the co-creation of actual value by both parties, and the evolution of the ways of being, thinking and working.”

I particularly like the first bullet as an ITSM definition, and the second for separating ITSM from other IT management disciplines.

So… Do We Still Have a Formal Definition of ITSM?

I didn’t know where I’d end up when I thought about writing this ITSM definition article; I only knew I was struggling to find a formal ITSM definition I could use in writing and presentations in 2026 and beyond.

I had hoped to find something I could use, where the reader or audience would nod and not take issue – it’s that “credibility” I spoke to earlier. I love Mark’s definition, and I’d use it personally, but I’m still not sure that we have (agreed on) something – as an industry – that we can hold up and say, “This is what ITSM is.” Like the formal ITSM definition that was so easy to bandy about in the days of ITIL v3 (2011 Edition).

Join the Discussion: What Is Your Definition of ITSM?

What do you think? Have you created or found an ITSM definition that you think people will buy into? Please let me know in the comments.

Addendum

Some words from Stuart Rance, ITIL author and ITSM-industry legend:

“As far as I’m concerned, ITSM is JUST service management as used by providers of IT services. And service management is reasonably well defined in many places.”

Further Reading

ITIL 4 Explained: Framework, Practices, and Key Changes