Step	Description of action	Dependency on 3rd party services (EOSC-hub or other)
UC1	A researcher requests to access the services of the EPOS-ORFEUS CC. He is redirected to the CC Authentication Service (relying on B2ACCESS in the background) where he can log in at his home institution or create a local account if needed. He receives a token. Depending on his profile he might be authorised to use the services of the CC. Profiles include information about the groups he belongs to (e.g. read permission of particular restricted data).	B2ACCESS
UC2	A researcher (authenticated and authorised) searches for datasets of her interest, by using an API. She selects one or more staging nodes from the available ones received, by interrogating the API. Finally she initiates the data movement by calling a dedicated method of the same API.	B2STAGE, B2SAFE, EIDA WFCatalog (with Dublin Core extension)
UC3	A seismologist (authenticated and authorised) wants to perform an analysis on a datasets previously selected and staged. He logs in the Jupyter environment close to the staged datasets. He selects and launches a kernel containing his preferred seismological libraries. When the correspondent Jupiter notebook is up and running the datasets are available in a local directory and he can perform his analysis. He might choose to pause his work and save it for later. Finally he can download results on his PC, move them to his personal cloud storage folder or made them available on a local folder.	EGI Notebook, B2DROP
UC4	A data centre acquires and stores waveform data by connecting to servers or devices. A network operator indicates data publicity policies to the data centre. At a next phase, a check of the expected data is performed as well as computation and ingestion of waveform data quality metrics (e.g. percentage availability). Meanwhile, manually data maintenance (e.g. gap filling) and replication is being implemented. Concerning replication, the data are transferred from the data archive to external resources by using B2SAFE. Finally, data requests via services are being traced and summed up to statistics regularly.	B2SAFE-DPM
UC5	A seismologist wants to analyse data that is available (previously staged) at different distributed compute centres. After accessing one the available Jupyter environments, he writes and test his analysis code. When he is satisfied with the results he might decide to run such an analysis code on a selected number of compute centres.	EGI Notebook
UC6	Despite that EPOS works with and provide access to open data, some seismic networks related to temporary experiments need to keep data embargoed for a short period of time. The management of the Access Control List (ACL) is in charge of the Network Operator or project PI. Originally, the PI contacted the data centre to include/exclude users from the ACL. EPOS would like to give permissions to PIs, so that they can manage the ACL by themselves using B2ACCESS groups from the B2ACCESS GUI. This way, data centres can configure their systems to grant access to groups (not individuals) and the PIs manage group members in a decentralised way.	B2ACCESS