Growth in air traffic demand and increasing attention for environmental impact of the air travel industry and airports has spurred the innovation of the Electric Taxi System (ETS). KLM Royal Dutch Airlines and Amsterdam Airport Schiphol (AMS) have instigated research to investigate the impact and potential benefits of the implementation of ETS. This thesis research work continues the exploration of ETS's impact at AMS by posing the following research question: What opportunities does the ETS offer for gate capacity and buffer utilization optimization, and what is the value of the impact of the ETS on apron operations at Amsterdam Airport Schiphol?