Swimlane / Cross-functional

flowchart LR
    subgraph Customer
      C1[Place order]
      C5[Receive item]
    end
    subgraph Sales
      S1[Confirm order]
      S2[Send invoice]
    end
    subgraph Warehouse
      W1[Pick item]
      W2[Ship item]
    end
    C1 --> S1 --> W1 --> W2 --> S2 --> C5