Editing Electromagnetic compatibility (section)

== Control ==
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The damaging effects of electromagnetic interference pose unacceptable risks in many areas of technology, and it is necessary to control such interference and reduce the risks to acceptable levels.

The control of electromagnetic interference (EMI) and assurance of EMC comprises a series of related disciplines:
* Characterising the threat.
* Setting standards for emission and susceptibility levels.
* Design for standards compliance.
* Testing for standards compliance.

The risk posed by the threat is usually statistical in nature, so much of the work in threat characterisation and standards setting is based on reducing the probability of disruptive EMI to an acceptable level, rather than its assured elimination.

For a complex or novel piece of equipment, this may require the production of a dedicated ''EMC control plan'' summarizing the application of the above and specifying additional documents required.

Characterisation of the problem requires understanding of:

* The interference source and signal.
* The coupling path to the victim.
* The nature of the victim both electrically and in terms of the significance of malfunction.