+**Requirements Engineering** is the critical initial phase that defines a system's purpose and functionality. It involves eliciting, documenting, and managing what [Stakeholders](/wiki/stakeholder) need, forming the essential blueprint for [Software Development](/wiki/software_development). This foundational work ensures the right solution is built.
+## See also
+- [Requirement](/wiki/requirement)
+- [System Design](/wiki/system_design)
+- [Business Analysis](/wiki/business_analysis)
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