Maximum Acceptable Outage (MAO)
1. Maximum Acceptable Outage or MAO is the time frame during which recovery must become effective before an outage compromises the ability of an Organization to achieve its business objectives and/or survival.
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2. Time it would take for adverse impacts, which might arise as a result of not providing a product/service or performing an activity, to become unacceptable.
Note : See also maximum tolerable period of disruption
(Source: ISO 22301:2012 – Societal Security – Business Continuity Management Systems - Requirements) - clause 3.25
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3. The maximum period of time that Critical business processes can operate before the Loss of Critical resources affects their operations.
(Source: HB 221:2004 Business Continuity Management)
(Source: Australia. A Practitioner's Guide to Business Continuity Management HB292 - 2006 )
4. The maximum period of time that an organization can tolerate the disruption of a critical business function, before the achievement of objectives is adversely affected.
NOTE: Also known as Maximum Tolerable Outage (MTO), maximum downtime (MD). Maximum Tolerable Period Downtime (MTPD).
(Source: AS/NZS 5050.1 Australian and New Zealand Standards for business continuity management.
Part 1: Business continuity management system specification)
5. The maximum period of time that an organization can tolerate the disruption of a critical business function, before the achievement of objectives is adversely affected.
NOTE: Also known as maximum tolerable outage (MTO), maximum downtime (MD). Maximum Tolerable Period Downtime (MTPD).
(Source: AS/NZS 5050.2 Australian and New Zealand Standards for business continuity management.
Part 2: Business continuity management practice standard)
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