Identify the missing word(s) in the following sentence:At its simplest, a requirement is a [?

A requirement in the context of Agile Business Analysis is understood as a service, function, or feature that a user needs. This definition encompasses the broad spectrum of what a requirement can entail, focusing on what the system or product must provide to meet the user's needs. By defining requirements this way, it ensures that the focus remains on the capabilities and functionalities that are necessary to deliver value to the user, rather than on specific solutions or objects which might limit the scope of what can be developed. References:Business Analysis document, sections on requirement definitions and user needs.

evel end-to-end prototype of the solution to be