ITIL - Change Management


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Introduction

Change in IT service refers to commissioning, decommissioning or upgradation of configuration of servers.

All changes are required to be implemented with minimum disruption of IT services.

Change Management process deals with following aspects while implementing a change −

  • Study the adverse impact of change and minimize it

  • Create and maintain change management process

  • Prevent unauthorized changes in the environment

  • Maintain record of all the changes

  • Post implementation review of all changes

Change is not implemented by change management team rather it is implemented by a technical team. Change management team only reviews and approves the change.

Change Manager is the process owner of this process.

Key Points

  • Change manager is the person who approves the changes and closes it. He also checks whether it meets the desired result.

  • Change coordinator raises change requests.

  • Change coordinator has to send screen shots after the change in Post Implementation Report (PIR).

Objectives

The objectives of change management process are as shown below −

Change Management Process

Seven Rs of Change Management

These are the seven questions that must be answered for all changes. It helps to assess the impact of changes and risk and benefits to the service.

Seven Rs of Change Management

Request For Change (RFC) is the key information source and the catalyst for the change activities of −

Request For Change
  • Create and record

  • Review

  • Assess and evaluate

  • Authorize

  • Plan

  • Coordinate

  • Review

  • Close

Each RFC will follow a certain change model that is suitable for the nature and type of change.

Change Models

There are basically three change models as explained below −

Standard change model

This model is used for pre-authorized repetitive, low risk and well tested changes.

Normal change model

In this model any change must go through certain steps such as assessment, authorization, and Change Advisory Board (CAB) agreement before implementation.

Emergency change model

This change model deals with highly critical changes needed to restore failed high availability service failure.

Change Advisory Board (CAB) is a body to authorize the changes and assist change management in assessing and prioritization the changes.

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