Staffing involves selecting, training, and retaining qualified personnel. It is a systematic process that aims to match employees' skills and knowledge to patient care needs. Key aspects of staffing include developing a staffing plan, determining staffing levels and ratios for different units, recruiting and selecting candidates, providing training and development opportunities, and conducting performance appraisals. The objectives are to ensure adequate staffing of critical care units while achieving appropriate nurse-patient ratios in other units and balancing staff needs with providing quality patient care.