The dual cycle, also known as double cycling, is an operational strategy used in container terminals to enhance efficiency. In this method, the same equipment (like quay cranes or yard tractors) is used to perform both loading and unloading tasks in a single cycle. This means that while a container is being unloaded from a ship, another container is simultaneously loaded onto the ship, or while a truck delivers an outbound container to the quayside, it picks up an inbound container for the storage yard.
This approach reduces idle time and increases productivity without requiring additional equipment or infrastructure investments. It primarily involves optimizing the scheduling and coordination of equipment and manpower.
Advantages of Double Cycling
- Increased Efficiency
- Optimized Crane Utilization
- Cost Savings
Disadvantages of Double Cycling
- Operational Complexity
- Infrastructure Demands
- Risk of Delays
- Training and Skill Requirements
Optimising several tasks in as few movements as possible separates high-performing ports from their competition. Double-cycling or dual-cycling of quay and yard cranes is an optimisation technique used within container ports. It is often a key consideration in discussions between the container terminal and shipping company port captains, port superintendents and vessel operations managers.