This hair is called âlanugo.â. Hereâs what you should know about your newbornâs body and head hair: 1  Lanugo hair is the hair that grows on the body of an unborn baby. Lanugo attempts to insulate the babyâs body because of a lack of fat.  Lanugo begins to grow around three months after conception.
However, what exactly is the difference between âfunctionalâ and ânon functionalâ requirements? Itâs not that complex, and once you understand the difference, the definition will be clear. The official definition of âa functional requirementâ is that it essentially specifies something the system should do.
The definition for a non-functional requirement is that it essentially specifies how the system should behave and that it is a constraint upon the systems behaviour. One could also think of non-functional requirements as quality attributes for of a system.unctional vs Non Functional Requirements. If there is any one thing any project must have in order not to be doomed to failure, that is a sensible and comprehensive collection of both the functional and non-functional requirements.