31. The system development ( Dev ) is responsible for implementing new features and functionalities to cover functional requirements . 32. Both techniques are already used in software and systems engineering to capture the functional requirements of a system. 33. These help to discover non-functional requirements . 34. IFLA ( 2010 ) . Functional Requirements for Subject Authority Data ( FRSAD ) : A Conceptual Model. 35. Usability is a non-functional requirement . 36. The museum's functional requirements are beautifully addressed in a simple style, with plenty of daylight illuminating the exhibition spaces. 37. It is certainly on the list in the article, but many elements seem to me to be functional requirements . 38. Non-functional requirements , which are unverifiable at the software level, must still be kept as a documentation of customer intent. 39. Increasingly, scenarios are used directly to define the wanted behaviour of software : replacing or supplementing traditional functional requirements . 40. The second process incorporates Peter Coad's ideas of using a feature list to manage functional requirements and development tasks.
