Stage of requirements elicitation and analysis in which technical staff interacting whit stakeholders to discover the requirements

Requirement discovery

Requirement classification and organization Requirement prioritization and negotiation Requirement specification

Constraints on the services or functions offered by the system Function requirement

Non-function requirement

Doman requirement

Stage of requirement engineering process which concerned with demonstrating that the requirement define the system that the customer really want

Requirement management Requirement specification Requirement validation Requirement elicitation and analysis