The delivery and maintenance of sound IT services relies on far more than just some clever people with good processes. Any IT service organisation needs to have many aspects of their operation working in tandem to support the goals and outcomes of IT service delivery. ITIL asks us to have a holistic perspective of the various forces that all work together to influence the results.

Within ITIL there are four dimensions of the IT service organisation that span the entire delivery of IT services. These represent the big picture, and all of these areas must be not only maintained but must work in close harmony together to deliver the best results. Interdependencies are the key to success, and any mature service provider must harness them effectively.