Herbert Simon defines career as an occupation pursued from youth through retirement. Career planning and development helps organizations sustain employee productivity and prepare for change. It identifies opportunities, reduces turnover, increases productivity, and enhances motivation by providing career paths that meet employees' changing needs and allow them to reach higher organizational goals. Effective career development involves employers, employees, career information, counseling, pathing, skills assessment, succession planning, and feedback. Challenges include insincere efforts, focus on immediate benefits over the long term, lack of interaction with support agencies, impractical implementation, and no evaluation system.