The human factor determines the success of a company. This central management insight is often preached in boardrooms and leadership circles, but rarely implemented in practice. For not everywhere is it clear: only top employees deliver top results; average or even unsuitable employees can ruin a company. Jörg Knoblauch speaks plainly: in most companies, there are too few top performers and too much mediocrity. Positions are advertised without a clear job profile, new employees are selected based on gut feeling, and annual employee reviews are considered sufficient for personnel development. Those who think and lead this way should not be surprised if their team spirals downward and their company faces bankruptcy. However, there are ways out of the personnel trap. Knoblauch demonstrates why personnel management is crucial.