Definition
Availability management is the process of ensuring that IT services and systems are accessible and operational when needed by users. It involves designing, implementing, and maintaining systems with resilience and redundancy to minimize downtime and service interruptions. This practice is crucial for maintaining business continuity, user satisfaction, and operational efficiency, as unexpected outages can lead to significant financial losses and reputational damage. For instance, a retail website employing availability management would have multiple web servers and redundant network connections to handle traffic spikes and hardware failures without impacting customer access. It differs from disaster recovery, which focuses on restoring services after a catastrophic event, by aiming to prevent disruptions in the first place. This concept is fundamental to domains like IT Service Management and is tested in certifications such as ITIL Foundation.