ITIL® procedures are those steps that are outlined in the Information Technology Infrastructure Library pertaining to the efforts of organizations (particularly businesses) in securing financial value and quality in their information technology operations. ITIL® procedures are defined as supplier-dependent steps that should help organizations be guided when implementing development, infrastructure and operations for their information technology system.
At present, the ITIL® version that people have to be certified in is the ITIL® v3 iteration. The ITIL® v3 procedures are listed in five publications, namely, Service Strategy, Service Design, Service Transition, Service Operation, and Continual Service Improvement. These five texts take off from the ITIL® v2 iteration while making ITIL® more comprehensive in the realm of IT service management.
At present, the eight existing publications under the ITIL® v2 iteration are: Service Delivery, and Service Support (which fall under the IT Service Management category); ICT Infrastructure Management, Security Management, The Business Perspective, Application Management, and Software Asset Management (which are categorized as Other Operational Guidance publications); and the eight which is Planning to Implement Service Management (that deals mostly with Service Management implementation.) There is also a ninth publication now dubbed ITIL® Small-Scale Implementation which is devoted to operational guidelines for IT systems on a reduced scale.
One reason ITIL® procedures are so widely-accepted and recognized throughout the world by many organizations is because it is able to standardize the vocabulary of information technology infrastructure so that only one clear set of definitions about terms for the components of IT systems will be used by end-users throughout the world.