|This article does not cite any references or sources. (June 2013)|
||The examples and perspective in this article may not represent a worldwide view of the subject. (June 2013)|
In conjunction with any official specification, manufacturers would then choose whether to design an aircraft or weapon for this particular requirement.
Operational Requirements were carried-over with the dissolution of the Air Ministry and the creation of the Ministry of Defence.
An Experimental Requirement (ER) was for an aircraft for research purposes, e.g. ER.100 in support of development of the English Electric Lightning.
|This military aviation article is a stub. You can help Wikipedia by expanding it.|