{
  "$schema": "https://nuncaeslupus.github.io/drawspec/schema/drawspec-v1.schema.json",
  "version": 1,
  "kind": "flow",
  "title": "Waiting lists: one loop that feeds itself, one that drains it",
  "description": "A causal loop diagram for a policy brief: longer waits mean more emergency admissions, which take beds from planned surgery, which lengthens the wait; and longer waits push some patients to private care.",
  "nodes": [
    {"id": "wait", "text": "Time on the waiting list", "role": "emphasis"},
    {"id": "acute", "text": "Emergency admissions"},
    {"id": "beds", "text": "Beds free for planned surgery"},
    {"id": "private", "text": "Patients who go private"}
  ],
  "edges": [
    {"from": "wait", "to": "acute", "polarity": "+", "delay": true},
    {"from": "acute", "to": "beds", "polarity": "-"},
    {"from": "beds", "to": "wait", "polarity": "-"},
    {"from": "wait", "to": "private", "polarity": "+"},
    {"from": "private", "to": "wait", "polarity": "-"}
  ],
  "loops": [
    {"text": "Deterioration", "nodes": ["wait", "acute", "beds"], "type": "reinforcing"},
    {"text": "Exit to private care", "nodes": ["wait", "private"], "type": "balancing"}
  ],
  "caption": "The double stroke marks a delay: a condition worsens over months before it becomes an emergency."
}