Do you know ITIL? ^^;

the concept of ITIL v3 explained very well in wikipedia.

The Information Technology Infrastructure Library (ITIL) is a customisable framework of best practices designed to promote quality computing services in the information technology (IT) sector. As an IT Service Management (ITSM) framework, ITIL provides a systematic approach to the provisioning and management of IT services, from inception through design, implementation, operation and continual improvement.
The processes identified and described within ITIL are supplier and platform independent and apply to all aspects of IT infrastructure. Since the mid 1990s, ITIL has been generally considered a de facto international standard for IT Service Management.[1]
The names ITIL and IT Infrastructure Library are Registered Trade Marks of the Office of Government Commerce (OGC), which is an Office of the United Kingdom's Treasury. The content of the books is protected by Crown Copyright.
As part of the overall OGC suite of publications, ITIL does not provide guidance or best practices on project or program management. It does, however, recognize that they are key to a successful ITIL implementation.
ITIL has recently undergone a refresh, and this page presents information about the newly published version 3 (ITIL v3), the core books for which were published on 30 June 2007. The major difference between v3 and its predecessor v2, is that v3 has adopted an integrated service lifecycle approach to IT Service Management, as opposed to organising itself around the concepts of IT Service Delivery and Support.


ITIL v3 core volumes

Service Strategy focuses on the identification of market opportunities for which services could be developed in order to meet a requirement on the part of internal or external customers. The output is a strategy for the design, implementation, maintenance and continual improvement of the service as an organizational capability and a strategic asset. Key areas of this volume are Service Portfolio Management and Financial Management.
Service Design focuses on the activities that take place in order to develop the strategy into a design document which addresses all aspects of the proposed service, as well as the processes intended to support it. Key areas of this volume are Availability Management, Capacity Management, Continuity Management and Security Management.
Service Transition focuses on the implementation of the output of the service design activities and the creation of a production service or modification of an existing service. There is an area of overlap between Service Transition and Service Operation. Key areas of this volume are Change Management, Release Management, Configuration Management and Service Knowledge Management.
Service Operation focuses on the activities required to operate the services and maintain their functionality as defined in the Service Level Agreements with the customers. Key areas of this volume are Incident Management, Problem Management and Request Fulfillment.
Continual Service Improvement focuses on the ability to deliver continual improvement to the quality of the services that the IT organization delivers to the business. Key areas of this volume are Service Reporting, Service Measurement and Service Level Management.
ITIL v3 uses the word "continual" as opposed to ITIL v2's references to "continuous" service improvement (CSIP). Continual implies an activity that is undertaken on a phased, regular basis as part of a process. Continuous is more suitable for the definition of activities intended to operate without pause, such as the ultimate goal of availability.