{
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  "canonical_url": "https://transduction.systems/entries/practice_lab_system_dynamics/",
  "release": "0.35",
  "citation": "Taylor, B. P. (2026). Practice: System Dynamics: build, calculate and challenge a queue model. The Necessary Tangle, release 0.35. https://transduction.systems/entries/practice_lab_system_dynamics/",
  "licence": "CC BY-SA 4.0 for original atlas text and data; linked works retain their own terms",
  "entry": {
    "id": "practice_lab_system_dynamics",
    "label": "Practice: System Dynamics: build, calculate and challenge a queue model",
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    "description": "Distinguish causal-loop reasoning from an executable stock-flow model and verify a small model by hand. An original discrete-time stock-flow rehearsal with a deliberately simple boundary. It is not a prediction of a real service and does not validate a model merely because it runs.",
    "aliases": [],
    "boundary_ring": "0",
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    "x": 0.38,
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    "node_id": "practice_lab_system_dynamics",
    "summary": "Distinguish causal-loop reasoning from an executable stock-flow model and verify a small model by hand. An original discrete-time stock-flow rehearsal with a deliberately simple boundary. It is not a prediction of a real service and does not validate a model merely because it runs.",
    "canonical_definition": "Distinguish causal-loop reasoning from an executable stock-flow model and verify a small model by hand. An original discrete-time stock-flow rehearsal with a deliberately simple boundary. It is not a prediction of a real service and does not validate a model merely because it runs.",
    "why_it_matters": "A concrete rehearsal with a fictional case, explicit outputs and a way to inspect the result.",
    "key_distinctions": [
      "Mechanical correctness is distinct from judgement in an open situation.",
      "Training-case application is distinct from competent organisational practice."
    ],
    "historical_lineage": [],
    "logical_antecedents": [],
    "dependent_subsequents": [],
    "practice_connections": [
      "Draw the stock-flow structure and state its units.",
      "Calculate the first four end-of-week backlogs.",
      "Describe a balancing feedback that could generate the capacity decision.",
      "Run two extreme-condition checks.",
      "Identify a missing mechanism that could reverse the policy conclusion."
    ],
    "common_misreadings": [
      "A worked comparison is not the only acceptable answer to an open question."
    ],
    "open_checks": [
      "An original discrete-time stock-flow rehearsal with a deliberately simple boundary. It is not a prediction of a real service and does not validate a model merely because it runs.",
      "Compare an independent attempt before revealing the worked answer."
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    "context_and_lineage": "Original educational resource, 7 September 2026.",
    "editorial_note": "Prepared with AI assistance. Publication authorised by Benjamin P Taylor. No independent specialist review or source-provider endorsement is claimed.",
    "last_researched": "2026-09-07",
    "title": "Practice: System Dynamics: build, calculate and challenge a queue model",
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    "review_status": "specialist_review_not_recorded"
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    {
      "id": "src_practice_lab_system_dynamics",
      "title": "System Dynamics: build, calculate and challenge a queue model",
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      "url": "https://transduction.systems/systems-thinking/practice/system-dynamics/",
      "date": "2026-09-07",
      "notes": "Original fictional exercise. An original discrete-time stock-flow rehearsal with a deliberately simple boundary. It is not a prediction of a real service and does not validate a model merely because it runs.",
      "creators": [
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      "doi": "",
      "isbn": "",
      "publisher": "The Necessary Tangle",
      "licence": "Original practice text CC BY-SA 4.0; external material retains source terms",
      "archived_url": "",
      "content_hash": "",
      "review_status": "original_material_and_source_boundary_recorded",
      "last_checked": "2026-09-07",
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    },
    {
      "id": "src_practice_external_mit_roadmaps",
      "title": "MIT: System Dynamics Self Study, assignments and solutions",
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      "url": "https://ocw.mit.edu/courses/15-988-system-dynamics-self-study-fall-1998-spring-1999/pages/assignments/",
      "date": "2026-09-07",
      "notes": "Assignment/solution pairs on the MIT page inspected. Historic software instructions may need adaptation; the whole course was not executed. Use: Start with the early assignments and their paired solutions. Predict behaviour, calculate it, then compare. Do not confuse this course with MIT courses that publish assignments without solutions.",
      "creators": [],
      "doi": "",
      "isbn": "",
      "publisher": "ocw.mit.edu",
      "licence": "External source terms; linked, not reproduced",
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      "review_status": "specific_access_and_content_limit_recorded",
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    },
    {
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      "quality_tier": "A",
      "access": "public",
      "url": "https://www.systemspractice.org/courses/systems-practice",
      "date": "2026-09-07",
      "notes": "Public listings inspected for VSM, SSM, CSH, SD, Patterns of Strategy, Mosaic and systems laws. Paid exercises and marking were not accessed. Use: Choose the named introduction or core module matching your method. Check current price, access arrangements and feedback provision before paying.",
      "creators": [],
      "doi": "",
      "isbn": "",
      "publisher": "www.systemspractice.org",
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      "title": "Systemic systems methods practice for systems practice (alpha)",
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      "access": "public",
      "url": "https://transduction.systems/systems-thinking/practice/",
      "date": "2026-09-07",
      "notes": "Alpha version. The original teaching material has not had independent specialist pedagogical review. These exercises support technical learning; they do not establish professional competence or accreditation.",
      "creators": [
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  "evidence_locators": [],
  "reuse_note": "Preserve source attribution, scope, and review status. Source documents and evidence excerpts are excluded."
}