Functional

Functional – The term functional relates to the capacity of a product or service to actually perform as expected. This can require certain systems or means in order to be sure it meets a standard that qualifies as functional. And said standard is one that will have to be understood nor only by the person actually producing the service, but also by those who use said services. Therefore it is of no advantage to any given party should the item end up not actually performing as expected. Should it require constant adjustments to work then the term normally will not apply.