Abstract
A method for four-way shuttle storage allocation and interface definition. The decomposition of tasks and the generation of subtasks are recorded in the database, and the execution state of tasks, such as execution start and execution completion, are recorded in the database. When a device failure or system power outage occurs during operation, the unfinished tasks are continued after recovery without affecting the entire process. The method is applicable to any tasks assigned to the storage location, including the warehouse moving task, the cargo tallying task and the warehouse returning task. A first subtask assigned to the cargo location roadway entrance is created, and a second subtask to the cargo location is created after the completion of the first subtask. The method reduces the traffic jam when allocating cargo space for four-way dense storage, and improved the efficiency of storage and retrieval.