On-demand scheduling is a key factor in implementation of flexible working time models and efficient assignment of working time. The "correct" scheduling technique is not given enough attention frequently. Numerous companies do not use their staff effectively and are wasting considerable capacity. Examples from companies that master this process show that significant costs can be saved. Systems for flexible and demand-oriented personnel deployment planning as well as efficient working time management offer a decisive competitive advantage. Here, "visionary" business leaders and personnel decision-makers rightly see great strategic optimization potential.