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Users of the system rely on the data to perform actions. This These actions could be life saving or preventing harm. Therefore the system should deliver its services reliably and need to be built to do so.

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The world is very complex and changing. To accomodate it, the system must be designed in a way, it can respond to changes. This implies, extensibility and the possibility of change. Methods of phasing out functions must be supported.

Scalability

The system will run on multiple nodes worldwide and nodes may be added/removed when required. The system must seamless integrate new nodes, functions and also scale up and down on workload needs.