Inherence
Inherence (from Latin inhaerere , 'to hang in something', 'to cling to something') generally denotes indwelling or attachment .
philosophy
In philosophy , the term inherence denotes the fact that some properties necessarily belong to certain things. There is an intimate connection (inherence) between a property and the bearer of the inherent or inherent property. The inherence thus underlines connections and dependencies. But the term also includes those properties that a thing or substance by a chance may adhere and therefore no need represent. This is what is known as commercial printing .
Example: With the statement The body is heavy , the property of heaviness is necessarily attached to the presence of a body. Because all bodies are material and therefore heavy (meaning). Weight, or more precisely its mass - weight only arises under the influence of a force such as gravity - is the inherent property of a body. If the exemplary body were still to be colored, then the color would only be a random property, but not a necessary one. Nevertheless - in this example - it adheres to the body.
The term subsistence stands in contrast to inherence .
technology
In technology , one often speaks of inherent safety when a technical system is designed in such a way that it works safely even after the failure of several components. However, the term redundancy as inherent for multi-channel security would be more appropriate. Prominent examples include hybrid drives of missiles , as the term is often associated with certain incidents designed nuclear power plants used. Pebble bed reactors in particular are mentioned by proponents of nuclear technology in this context. It should be noted that there are residual risks in the operation of systems that are designated as inherently safe .
In English, the term walk-away-safe ( German for something like "run away-safe") is mostly used for it. It states that a system is designed in such a way that when you leave it, it continues to run safely (without staff) and at some point switches itself off. Because over time (through wear and tear) every security system no longer works at some point, the term can be used in the same context as inherent .
In the context of risk reduction in accordance with EN ISO 14121-1, or now EN ISO 12100-1 , the term inherent safety is used as part of the risk reduction process. The point here is not to let a potential hazard arise at the source. This means that if there is a risk of crushing, for example, the dangerous movement is completely eliminated by adapting the function to be fulfilled so that the dangerous movement is no longer required. In the case of redundant safety systems, failure probability calculations must be carried out in accordance with EN ISO 13849 , which are omitted in the case of an inherent construction, since the hazards do not even arise.
quality
In terms of quality , one speaks of inherent characteristics , whereby here 'inherent' in contrast to 'assigned' rather means 'inherent in a unit', especially as a permanent characteristic, e.g. B. in the technical sense the diameter of a screw .
Inherent features are therefore those that are inherent in the unit under consideration - in modern quality management this can be a product, a process or a system - and thus define its nature. Features such as costs or price are considered to be assigned features that are not inherent in the unit under consideration.
See also
literature
- Carlos A. Dufour: Inherence. Ontological studies on properties and inherence . Philosophia, Munich 2005, ISBN 3-88405-087-7 .
