At the ITGN we use an Operating Model to describe how an IT organisation functions in support of its business operation. The operating model defines the major information and technology capabilities required to support and execute your business strategy; and how the core components of capability (process, technology and people) are used to drive efficiency and effectiveness.
The COBIT 5 framework can be used to organize IT activities into a logical operating model of 37 process in total. While not all the processes might be essential, the integrated nature of the processes will require that at least a few activities of each process will be required. Defining your organisation's own processes will take into account the integration necessary as well as the possible consolidation of activities into fewer processes.
Good governance requires accountability for the outcomes achieved and mutual respect for each others' decision-making authority. An accountability framework clarifies which roles and responsibilities are important to delivering the results expected, who should lead and who supports the value creation. The operating model separates out responsibility and identifies the "touch-points" between process and process area responsibilities.
Usually, a number of processes and process areas support the operating model. The objective of good IT governance is to effectively and efficiently leverage the IT resources in support of achieving the organisaton's strategic objectives.