flowchart TD
    A[Submit purchase request] --> B{Complete information?}
    B -->|No| C[Request details]
    C --> A
    B -->|Yes| D{Above USD 500?}
    D -->|Yes| E[Finance review]
    D -->|No| F[Manager review]
    E --> G{Approved?}
    F --> G
    G -->|Yes| H[Place order]
    G -->|No| I[Record reason]