Incomplete Deliverables
Regarding deliverable 6,
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The component diagram should not target a user story. It should outline key components, packages and nested components, required and provided interfaces of components, associations between components. For your component diagram, the associations between components are missing. Moreover, it seems like you tried to provide interactions. The component diagram is not like that.
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The sequence diagram for one user story is incomplete. It has to provide the complete flow for one user story. It seems partially complete. There is no acknowledgment of messages. The lifetime of objects is not correct it seems.
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The activity diagram is halfway there.