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      "type": "calendar",
      "label": "Fixed Plan",
      "x": 48,
      "y": 88,
      "w": 155,
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      "detail": "waterfall"
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      "type": "divider",
      "label": "→ Requirement changes",
      "x": 271,
      "y": 104,
      "w": 24,
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      "id": "n3",
      "type": "loop-arrow",
      "label": "Sprint Cycle",
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      "detail": "2-week loops"
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      "label": "breaks"
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      "label": "replaced by"
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  "summary": "Waterfall fixed plans break when requirements change; short sprint cycles adapt continuously.",
  "mechanism": "iterative-delivery",
  "fig": "FIG. / PLAN VERSUS CYCLE",
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