Functions are like the specialized teams you have in organizations. To give a few examples:
- Java team
- Network team
- Unix team
- Database team
These specialist teams are well versed in their area of concentration. They perform specialized tasks.
ITIL definition of a function goes something like this – units of organizations specialized to perform certain types of work and are responsible for specific outcomes.
Processes are like your projects. A process has a specific goal that it needs to achieve, just like your project teams. In a project team, you will have people with different skills in it. Likewise, in a process too, you will have different specialist teams carrying out activities. So, in essence, the people who are a part of functions, carry out process activities.
ITIL definition of a process – A process is measurable, performance-driven, responds to specific triggers and delivers specific results to customers or stakeholders.
I am giving you a brief blurb on functions and processes. For a detailed understanding, read my earlier post on ITIL functions and processes where the two are explained in detail with examples.