エンタープライズ技術のための内製 vs 購入の意思決定フレームワーク

flowchart TD
    A([Start: Technology Need]) --> B[Strategic Assessment]
    B --> B1[Alignment with core competency?]
    B --> B2[Competitive differentiation?]
    B --> B3[Commonalization across entities?]
    B1 & B2 & B3 --> C[Initial Classification]
    C --> C1{Core to strategy?}
    C1 -- Yes --> D[Build Track]
    C1 -- No --> E[Buy Track]
    D --> D1[Internal capability assessment]
    D --> D2[TCO modeling: 5-year build cost]
    D --> D3[IP & talent retention plan]
    E --> E1[Vendor market scan]
    E --> E2[TCO modeling: 5-year buy cost]
    E --> E3[Integration & migration plan]
    D1 & D2 & D3 --> F{Build TCO < 1.5x Buy TCO?}
    E1 & E2 & E3 --> F
    F -- Build wins --> G[Build Governance Gate]
    F -- Buy wins --> H[Vendor Selection Process]
    F -- Unclear --> I[PoC / Pilot Both]
    I --> F
    G --> J([Build Approved])
    H --> K([Vendor Selected])
    style A fill:#1a1a2e,stroke:#7c3aed,color:#e2e8f0
    style B fill:#1e293b,stroke:#6366f1,color:#e2e8f0
    style B1 fill:#1e293b,stroke:#475569,color:#e2e8f0
    style B2 fill:#1e293b,stroke:#475569,color:#e2e8f0
    style B3 fill:#1e293b,stroke:#475569,color:#e2e8f0
    style C fill:#1e293b,stroke:#6366f1,color:#e2e8f0
    style C1 fill:#1e1b4b,stroke:#8b5cf6,color:#e2e8f0
    style D fill:#1e293b,stroke:#8b5cf6,color:#e2e8f0
    style D1 fill:#1e293b,stroke:#475569,color:#e2e8f0
    style D2 fill:#1e293b,stroke:#475569,color:#e2e8f0
    style D3 fill:#1e293b,stroke:#475569,color:#e2e8f0
    style E fill:#1e293b,stroke:#3b82f6,color:#e2e8f0
    style E1 fill:#1e293b,stroke:#475569,color:#e2e8f0
    style E2 fill:#1e293b,stroke:#475569,color:#e2e8f0
    style E3 fill:#1e293b,stroke:#475569,color:#e2e8f0
    style F fill:#1e1b4b,stroke:#8b5cf6,color:#e2e8f0
    style G fill:#1e293b,stroke:#22c55e,color:#e2e8f0
    style H fill:#1e293b,stroke:#3b82f6,color:#e2e8f0
    style I fill:#1e293b,stroke:#f59e0b,color:#e2e8f0
    style J fill:#0d1f12,stroke:#22c55e,color:#e2e8f0
    style K fill:#0d1f12,stroke:#22c55e,color:#e2e8f0