In this tutorial, we will discuss the ITIL Availability Management Process. In this article, you will learn about the definition, objective, scope, component, activities, and sub-process of Availability Management - ITIL V3 Process.
What is ITIL Availability Management Process?
According to the definition, ITIL Availability Management is used to ensure the availability of services whenever needed. This usually means making sure every service is up for use under the conditions of service level agreements (SLAs).
To achieve this, Availability Management team periodically reviews business process availability requirements. And then, they make sure that the most cost-effective contingency plans are in place.
These plans are tested on a regular basis to make sure that it meets the business needs.
ITIL Availability Management Scope:
As stated in ITIL V3, Availability Management process plays a leading role in component failure impact analysis (CFIA) and service outage analysis (SOA) initiatives.
Typically, the Availability Management team determines the cause of the problem, analyzes any related trends, and then takes the steps to ensure service availability according to SLAs.
Availability Management (ITIL V3) is tightly bound with other ITIL processes.
The ITIL Availability Management process works jointly with Capacity Management, Service Level Management, and IT Service Continuity Management to plan for the infrastructure requirement needed to meet the targeted service level and quality.
ITIL Availability Management Objective:
The primary objective of ITIL Availability Management process is to define, analyze, plan, measure and improve all aspects of the availability of IT services.
It is responsible for ensuring that all IT infrastructure, processes, tools, roles etc are appropriate for the agreed availability targets.
ITIL V3 Availability Management Components:
Availability Management (in ITIL V3) basically has six components which determine the accuracy service availability. Those are as follows:
- Availability: Determines the ability of the service or component to provide the agreed-upon functionality when required.
- Reliability: Determines ability of a service or component to perform at an agreed level at described conditions.
- Maintainability: Describes the ability of a service or component to remain operational, or be restored to an operational state.
- Serviceability: Describes the ability for an external supplier to maintain the availability of service or component under a third-party contract.
- Resilience: It’s a method of keeping services reliable in an event of major failure and it also measures the chances of such failure. This broadly describes the need to service redundancy.
- Security: Security refers to the confidentiality, integrity, and availability of all service related data.
Availability Management also has the responsibility of continual monitoring, measuring, analyzing and reporting of the above mentioned components.
ITIL Availability Management Activities:
According to ITIL V3, Availability Management process includes two types of activities, (i) Reactive and (ii) Proactive.
(i) Reactive Activities:
Reactive Availability Management includes activities such as monitoring, measuring, analysis and management of all events, incidents, and problems causing service unavailability. These activities are generally performed by operational roles.
(ii) Proactive Activities:
Proactive Availability Management includes proactive planning, design, and monitoring of services to improve the availability.
These activities are typically performed by design and planning roles.
Proactive activities can be further divided into two categories: Service Availability & Component Availability. Activities performed under this proactive category are:
- Participate in IT infrastructure design.
- Monitor actual IT availability achieved.
- Create, maintain & review Availability Plan.
- Schedule Availability Testing.
- Attend CAB meetings.
- Assessment & Testing after a major business change.
- Assess & Manage Risk in an economically viable way.
ITIL Availability Management Sub-Process:
According to ITIL v3, Availability Management Process has three sub-process operating under it.
The objectives and descriptions of those sub-processes are given below, followed by a diagram illustrating the ITIL Availability Management Proces Flow:
1) Design Services for Availability:
As the name suggests, this sub-process is responsible for designing the procedures and technical features required to fulfill the agreed availability levels.
2) Availability Testing:
This sub-process is responsible for scheduling and arranging for regular testing of all availability, resilience and recovery mechanisms.
3) Availability Monitoring and Reporting:
Used to monitor the current availability achievements of services and components, compare that result with the agreed availability benchmarks, identify the improvement areas, and preparing a detailed report.
It also circulates the report to other Service Management processes and IT Management for decision-making purpose.
Important Terminologies and Definitions:
Below lists describes the important terminologies and definitions used in ITIL Availability Management:
Availability Design Guidelines:
- It draws the guidelines from a technical point of view, that how the required availability levels can be achieved, including specific instructions for application development and for externally sourced infrastructure components.
Availability Guidelines for the Service Desk:
- Guidelines for Service Desk on how to manage Incidents causing unavailability.
- The goal of this guideline is to prevent minor incidents from becoming major Incidents.
Availability Management Information System:
- A virtual repository of all Availability Management data, typically stored in multiple physical locations.
- The Availability Plan contains detailed information about initiatives taken for improving the availability of service or component.
Availability/ ITSCM/ Security Testing Schedule:
- A schedule for the periodic testing of all availability, continuity and security mechanisms, jointly regulated by Availability Management, IT Service Continuity Management (ITSCM), and Information Security Management.
- A Report containing information related to service and infrastructure component availability.
- This Report is then circulated to other Service Management processes and IT Management for decision making purpose.
Event Filtering and Correlation Rules:
- Rules and Criteria are used to determine if an Event is significant and to decide upon an appropriate response.
- Event Filtering and Correlation Rules are typically used by Event Monitoring Systems in the Event Management process. But some of those rules are defined during the Availability Management process of Service Design Stage, to ensure that events are triggered when the required service availability is endangered.
Maintenance Plan/ SOP:
- Define the frequency and scope of preventative maintenance.
- It is jointly created by Availability Management and IT Service Continuity Management.
- This recovery plan contains specific instructions for restoring specific services or components to a working state from a major failure.
Technical/ Administration Manual:
- A document detailing the required procedures to run and maintain application or infrastructure component.
- A Test Report provides a summary of testing and assessment activities performed by any ITSM process.
Vital Business Function (VBF):
- VBF refers to business-critical elements that are supported by an IT service.
Service Failure Analysis (SFA):
- It is a structured approach to identifying causes of service interruption.
ITIL Availability Management Roles and Responsibilities:
- Availability Manager role is the Process Owner of Availability Management Process.
- This role is responsible for defining, analyzing, planning, measuring and improving all aspects of the availability of IT services & components.
- Availability Manager also has to coordinate with Capacity Manager to ensure that all IT infrastructure, processes, tools, roles etc. are appropriate for achieving the agreed service level targets for availability.
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