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== O-PAS System Attributes ==
The O-PAS standard defines 23 key quality attributes<ref>{{Cite web |last=Digital |first=Aro Eleven Marketing |title=Line NOVA O-PAS |url=https://www.smar.com.br/nova-o-pas |access-date=2024-08-12 |website=SMAR Technology Company |language=pt-br}}</ref><ref name=":2" />, three of which are foundational quality attributes: safety, reliability, and securability.<ref name=":1">{{Cite book |title=The O-PAS Standard, Part 1 Technical Architecture |date=February 2023 |publisher=The Open Group |year=2023 |isbn=978-1-957866-10-9 |edition=2.1 |publication-date=February 2023 |pages=2 |language=English}}</ref>
{| class="wikitable"
|+
|Affordability
|Availability
|Compatibility
|Configurability
|Discoverability
|Evolvability
|-
|Flexibility
|Interchangeability
|Interoperability
|Maintainability
|Manageability
|Modularity
|-
|Portability
|Reliability
|Resilience
|Reusability
|Safety
|Scalability
|-
|Securability
|Standard Conformance
|Testability
|Traceability
|Usability
|
|}
{| class="wikitable"
|+Three Foundational Quality Attributes
!Attribute
!Description
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|The ability of a system or component to be protected against unauthorized access or modification throughout its lifecycle
|}
The O-PAS standard Part 1 defines an additional four key quality attributes: interchangeability, interoperability, portability, and modularity.<ref name=":1" /><ref name=":2">{{Cite web |title=O-PAS V2.1 Part 1 |url=https://pubs.opengroup.org/open-process-automation/standard/opas2.1/part1.html#_Toc124163570 |access-date=2024-07-26 |website=pubs.opengroup.org}}</ref>
== History ==
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