Redundancy (in technological system design)

The duplication of component[1] parts of a system[3] and/or a subsystem as a “backup” or “fail safe” provision to increase reliability[2].

Terms definitions
1. component. The three strands of Technology in the NZC (Technological Practice, Technological Knowledge, and Nature of Technology) – together with the six specialist knowledge and skills strands for levels 6, 7, and 8) – support the development of students’ technological literacy. Each of these strands is broken down into smaller groupings (or substrands) called “components”. For […]
2. reliability. In technological systems, reliability refers to a system’s ability to perform consistently and maintain its expected functions when operated within a specified manner.
3. system. A set of interconnected parts designed to transform, store, transport or control materials, energy and/or information.