A technical requirement used to guide (drive) the designers and verification planners during development of a CI. In a perfect world where nothing went wrong, synonymous with Qualification Requirement, except that the final Qualification Requirements might end up not matching the Development Requirements actually used to drive the design.
The best ways to use this term are:
- In the present test, to indicate what the requirements are now.
- In the past tense, to clearly distinguish between what we (the developers) thought we were supposed to be doing in the first place (on the one hand) and what the acquisition customer finally settled on at the end (on the other hand). See also Plan C and Pearl Harbor File.