Selection involves screening candidates for vacant positions and choosing those with the required abilities and qualifications. This leads to hiring competent employees with higher efficiency and lower absenteeism, turnover, and accidents, improving job satisfaction and morale. However, selection requires expertise, time, multiple rooms, and costs to develop and administer, especially for large organizations. Factors considered include physical and personal characteristics, skills, competency, temperament, and interests. Companies may follow different selection procedures depending on their size, nature of business, number of candidates, and regulations. External factors like supply/demand, the labor market, unemployment, and laws affect selection, as do internal factors such as company image, policies, HR planning, and hiring costs.