The demographic change, the emigration of qualified workers, and the widely criticized German education system are contributing to the increasing shortage of skilled workers in Germany, which is increasingly being pointed out by business circles. It is essential to retain good personnel within the company. When sought-after employees leave the organization, a suitable replacement is often not available. Even if it is, replacing old employees with new ones incurs many direct (such as recruitment costs) and indirect (for example, disruption of customer relationships) costs. From the employees' perspective, retention leads to increased perceived security, trust, less stress, and improved job satisfaction. This book intensively examines the contribution of personnel development to employee retention. This work carries a.