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| defensive design ： ウィキペディア英語版 |
defensive design
Defensive design is the practice of planning for contingencies in the design stage of a project or undertaking. Essentially, it is the practice of anticipating all possible ways that an end-user could misuse a device, and designing the device so as to make such misuse impossible, or to minimize the negative consequences. For example, if it is important that a plug be inserted into a socket in a particular orientation, the socket and plug should be designed so that it is physically impossible to insert the plug incorrectly. Power sockets are often keyed in such a manner, to prevent the transposition of live and neutral.
Defensive design in software engineering is called defensive programming. Murphy's law is a well-known statement of the need for defensive design.
==Examples==
* Many electrical connectors apply this principle by being asymmetric.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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