Improving schedule reliability and sailing frequency as triggered by the launch of Daily Maersk by Maersk Line has profoundly influenced the liner shipping industry since late 2011. In contrast to a standard weekly service, Daily Maersk offers daily departures. It also guarantees transportation times in an industry that has long had a notorious reputation of schedule unreliability. This article first quantifies that Daily Maersk substantially reduces a shipper’s supply chain inventories, including cycle stock, pipeline stock, and safety stock. It then systematically analyzes the Daily Maersk effect on the liner shipping industry and its long-term implications for the supporting port industry. Recommendations are given to shipping lines and ports for their strategic planning in an increasingly competitive business environment.