TS EN IEC 62853

TS EN IEC 62853 addresses open systems dependability and sets out the process views needed across a system life cycle to achieve dependability objectives. In an open-system context, interfaces, operating environments and human interactions can vary more than in closed or tightly controlled systems, so dependability is not limited to avoiding failure; it also concerns maintaining intended function, integrity and service continuity over time.

What dependability means in an open-system setting

In general technical terms, an open system is designed to interact with external systems, services and technologies. Such systems may combine hardware, software and human elements, so dependability assessment must extend beyond equipment alone to include processes and interactions. This standard expands the IEC 60300-1 approach by detailing the changes needed to accommodate the characteristics of open systems.

Life-cycle processes and assurance activities

The document uses process views based on ISO/IEC/IEEE 15288:2015, which identifies the set of system life-cycle processes. It helps organizations determine the activities and tasks needed to meet dependability objectives, including dependability-related communication, dependability assessment and evaluation throughout the life cycle. Security is especially important in open systems because they are more exposed to attack, so dependability in this context is closely tied to the system’s exposure and operating conditions.

• Applies to life cycles of products, systems, processes or services.
• Covers hardware, software and human aspects, or integrated combinations of these elements.
• Addresses process views specific to open systems and assurance of expected outcomes.
• Supports definition of activities and tasks needed to achieve dependability objectives.