This day is dedicated to ecFlow, ECMWF’s task scheduler for building and managing complex meteorological workflows on the HPC. Participants will learn how to create and run suites, handle task dependencies, and incorporate advanced features such as triggers and error handling. The training emphasizes best practices and realistic examples to help users develop robust, maintainable workflows for both operational and research environments. This day is ideal for anyone responsible for automating or managing data processing chains or forecast production systems at ECMWF.