open_questions:
  - id: OI-001
    question: 返品時の送料負担は誰が負うか
    background: REQ-042 受注キャンセル・返品フローに影響
    required_by: REQ-042 確定前
    status: open
    owner: PM
    related:
      requirements: [REQ-042]
      business_rules: [BR-042-01]
      screens: []
      tables: []
      risks: [RISK-001]
    source_refs:
      - path: reference/baseline-open-items.md
        section: 未決・確認待ち
        quote: OI-001 （例）返品時の送料負担
    notes: baseline-open-items.md の表と同期維持