---
title: Availability
slug: en/availability
description: This document explores the concept of availability in ITIL, emphasizing its importance in ensuring that IT services can perform their function when needed. It delves into the various factors that influence availability, such as reliability, maintainabilit
docTags: 
createdAt: 2021-10-27T20:08:02.000Z
---

## Presentation

According to ITIL, <font color="#3b9f0f">**Availability** </font>is defined as the "**Ability of an IT service or other
&#x20;configuration item to perform its agreed function when required**. Availability is
&#x20;determined by reliability, maintainability, serviceability, performance and
&#x20;security".

****<font color="#3b9f0f">**Availability Management**</font> is defined as "**The process responsible for ensuring that
&#x20;IT services meet the current and future availability needs of the business in a
&#x20;cost-effective and timely manner**."

****<font color="#3b9f0f">**Availability Management**</font> "defines, analyses,
&#x20;plans, measures and improves all aspects of the availability of IT services, and
&#x20;ensures that all IT infrastructures, processes, tools, roles, etc. are
&#x20;appropriate for the agreed service level targets for availability".