# Partial Flows The functional design (FD) describes recurring **partial flows** within the system. These capture fragments of interaction between the user and external systems that appear multiple times across different scenarios, including variations and possible errors. They ensure consistency and clarity in how the system handles repeated patterns of behaviour. Read more about [how the functional design is formalized](functional-design). ```{toctree} :maxdepth: 1 :caption: Partial Flows: :glob: partial-flows/* ```