graph LR
    subgraph "3-of-5 Threshold Signature"
        S1[Signer 1<br/>CFO]
        S2[Signer 2<br/>COO]
        S3[Signer 3<br/>CLO]
        S4[Signer 4<br/>CTO]
        S5[Signer 5<br/>CISO]
        
        S1 -->|Sign| AGG[Aggregate<br/>Signature]
        S2 -->|Sign| AGG
        S3 -->|Sign| AGG
        S4 -.->|Not required| AGG
        S5 -.->|Not required| AGG
        
        AGG --> V{Threshold Met?<br/>≥3 signatures}
        V -->|Yes| VALID[Transaction<br/>Authorized]
    end
    
    style S1 fill:#c8e6c9
    style S2 fill:#c8e6c9
    style S3 fill:#c8e6c9
    style S4 fill:#e0e0e0
    style S5 fill:#e0e0e0
    style VALID fill:#a5d6a7