A nurse is caring for a client with multiple complex health issues and must develop a care plan. Which nursing process step should the nurse prioritize to ensure that interventions are evidence-based and targeted to the client's unique needs?

The nursing process consists of five steps: Assessment, Diagnosis, Planning, Implementation, and Evaluation. When developing a care plan for a client with multiple complex health issues, the Planning step is the critical juncture where the nurse translates assessment findings and nursing diagnoses into individualized, prioritized, evidence-based goals and interventions. Planning ensures that every intervention has a clear rationale tied to the client's specific problems and expected outcomes, which is the definition of targeted, evidence-based care. The option suggesting the nurse prioritize 'Assessment to collect baseline vital signs only' is too narrow; while assessment is foundational, restricting it to vital signs ignores the comprehensive data collection needed for complex clients. The option describing 'Implementation to document nursing actions' misidentifies documentation as an implementation priority rather than a planning one, and documentation alone does not ensure evidence-based targeting. The option framing 'Evaluation to confirm ethical issues are resolved' conflates evaluation — which measures whether goals have been met — with an ethical process that is more appropriately addressed throughout the entire nursing process. Planning is the step that bridges assessment findings with purposeful clinical action, making it the priority when building a care plan.