What do the process models for dealing with complexity from each of these clusters look like and can they be produced as a mermaid diagram

Based on the sources, while these authors possess differing philosophical assumptions, almost all of them translated their theories into practical, step-by-step methodologies for intervention.

Because complexity manifests differently across these domains, their process models take fundamentally different shapes—ranging from the structural mapping of System Dynamics to the dialectical loops of Soft Systems, and the parallel experimentation of Complexity Science.

Here are the operational process models for the primary clusters, complete with their logic and Mermaid diagrams.

1. The System Dynamics & Leverage School (Meadows, Senge, Richmond)

The Logic: This process model assumes that problems are generated by the underlying “plumbing” of the system (stocks, flows, and feedback loops). The process forces investigators to stop reacting to surface-level events, drill down to uncover the historical patterns, map the circular structures causing them, and find the non-obvious “leverage points” to intervene.

graph TD
    A[Observe the Mess] --> B[Level 1: Identify Surface Events]
    B --> C[Level 2: Map Patterns Over Time]
    C --> D[Level 3: Map Systemic Structure]
    D --> E[Identify Feedback Loops & Delays]
    E --> F[Match to Systems Archetypes]
    F --> G[Locate High Leverage Points]
    G --> H[Intervene & Alter Constraints]
    H --> A

2. Organizational Cybernetics (Beer, Hoverstadt, Jose)

The Logic: Based on the Viable System Model (VSM), this process diagnoses an organization’s structural capability to survive in a complex environment. It maps the system by diagnosing its five necessary sub-systems, checking whether the internal “variety” (responses) matches the external “variety” (disturbances), and ensuring there is a balance between present stability and future adaptation.

graph TD
    A[Define Identity & Boundaries using POSIWID] --> B[Diagnose System 1: Operations & Local Environments]
    B --> C[Diagnose System 2: Anti-Oscillation / Coordination]
    C --> D[Diagnose System 3: Internal Control & Delivery]
    D --> E[Diagnose System 4: Future Intelligence & Strategy]
    E --> F[Diagnose System 5: Policy & Ultimate Identity]
    F --> G[Audit Requisite Variety]
    G --> H{Is Variety Balanced?}
    H -- No --> I[Engineer Amplifiers & Attenuators]
    H -- Yes --> J[Maintain Homeostasis]
    I --> B

3. Soft Systems & Epistemological Constructivism (Checkland, Wilson)

The Logic: Soft Systems Methodology (SSM) operates on the premise that the real world is a “mess” and systems only exist in our minds. Therefore, the process model involves a strict physical separation: stepping out of the real world to build abstract, logical models based on different worldviews, and then bringing those models back into the real world to structure a debate.

graph TD
    subgraph Real World
        A[Enter Problematic Situation]
        B[Express via Rich Pictures]
        H[Structure Debate: Compare Models to Reality]
        I[Seek Accommodation of Worldviews]
        J[Take Culturally Feasible Action]
    end

    subgraph Systems Thinking World
        C[Select Relevant Perspectives]
        D[Formulate Root Definitions using CATWOE]
        E[Build Conceptual Activity Models]
        F[Test via the 3 Es: Efficacy, Efficiency, Effectiveness]
    end

    A --> B
    B --> C
    C --> D
    D --> E
    E --> F
    F --> H
    H --> I
    I --> J
    J -.-> A

4. Critical Systems & Emancipatory Boundaries (Jackson, Flood, Ulrich)

The Logic: Critical Systems Practice (CSP) uses the EPIC framework (Explore, Produce, Intervene, Check) and Total Systems Intervention (TSI). It is a “meta-methodology” that prevents practitioners from blindly using a single tool. It first explores the organization through different metaphors, chooses the right methodology based on power dynamics and complexity, and rigorously critiques ethical boundaries.

graph TD
    A[Explore: View situation through multiple Metaphors] --> B[Analyze Context: Simple vs Complex, Unitary vs Coercive]
    B --> C[Produce: Select Methodology via SOSM Grid]
    C --> D[Intervene using chosen tool]
    D --> E[Boundary Critique: Who benefits? Who is marginalized?]
    E --> F[Check: Evaluate Efficacy & Ethics]
    F -.->|If context shifts| A

5. Systemic Design & Wicked Problem Architecture (Nelson, Rittel, TRIZ)

The Logic: This cluster moves away from reactive “problem solving” toward proactively designing the “Ultimate Particular” driven by human aspirations (Desiderata). The process requires establishing “conscious not-knowing,” mapping the apposition (fit) between the environment and the system, and asking teleological “Is vs. Ought” questions before composing an intervention.

graph TD
    A[Establish Stance: Conscious Not-Knowing] --> B[Map the Territory: Look Around, Into, Out]
    B --> C[Teleological Critique: What IS vs What OUGHT to be]
    C --> D[Identify the Problematic Gap]
    D --> E[Formulate Desiderata / The Parti]
    E --> F[Apply Design Judgment / Phronesis]
    F --> G[Compose the Ultimate Particular]
    G --> H[Introduce to Environment & Evaluate Apposition]
    H -.-> B

6. Radical Uncertainty, Antifragility & Adaptive Action (Snowden, Taleb, Revans)

The Logic: Because complex domains feature unknown unknowns, “best practices” and predictive planning fail catastrophically here. Dave Snowden’s Cynefin framework and Nassim Taleb’s Antifragility dictate a process of decentralized “tinkering.” You must act first using parallel, safe-to-fail probes to stimulate the system, see what emerges, and then adapt. (This also perfectly mirrors Juarrero’s constraint modulation).

graph TD
    A[Acknowledge Complex/Unknowable Domain] --> B[Elicit Pre-Hypothesis Narratives]
    B --> C[Formulate Multiple Competing Hypotheses]
    C --> D[Launch Parallel Safe-to-Fail Probes]
    D --> E[Sense & Monitor Feedback]
    E --> F{Did a positive pattern emerge?}
    F -- Yes --> G[Amplify: Stabilize new constraints]
    F -- No --> H[Dampen: Kill the probe quickly/cheaply]
    G --> I[System Evolves / Adapts]
    H --> C

7. Ontological Complexity & Thermodynamics (Juarrero, Boisot, Allen, Ladyman)

The Logic: This process model assumes that complexity is a physical, thermodynamic reality where systems operate far-from-equilibrium. It rejects the idea that you can “force” a complex system to change using linear cause-and-effect. Instead, the process dictates mapping the hierarchical scale of the problem (fast vs. slow variables), identifying areas of high “adaptive tension,” and modulating the constraints (the boundaries and rules) to allow the system to spontaneously self-organize into a new state.

graph TD
    A[Define Scale & Hierarchy] --> B[Separate Fast Dynamics from Slow Environmental Constraints]
    B --> C[Map the Phase Space: Identify Attractors & Tensions]
    C --> D[Identify Context-Independent Constraints: Gradients/Boundaries]
    D --> E[Identify Context-Dependent Constraints: Rules/Feedback Loops]
    E --> F{Is the goal to Destabilize or Stabilize?}
    F -- Destabilize --> G[Remove buffers, amplify positive feedback, introduce noise]
    F -- Stabilize --> H[Add damping feedback, introduce rules/scaffolds]
    G --> I[System reaches Instability Threshold / Bifurcation]
    H --> J[System deepens its Basin of Attraction]
    I --> K[Spontaneous Self-Organization / New Emergent Order]
    J --> K
    K -.-> C

8. The Biology of Meaning & The Cybernetic Cut (Rosen, Pattee, Noble, Maturana)

The Logic: This cluster bridges physical dynamics and symbolic meaning. Because living and social systems are operationally closed and cannot be “instructed” from the outside, top-down blueprints fail. This process model uses a “Middle-Out” approach: you start at the level of the observable function, apply the “Epistemic Cut” to separate the physical dynamics from the symbolic constraints, map the circular causality, and then introduce non-coercive “perturbations” to trigger the system to change itself.

graph TD
    A[Select Middle-Out Focal Level: Where function is observed] --> B[Apply Epistemic Cut: Separate Dynamics from Symbols]
    B --> C[Map Rate-Dependent Dynamics: Upward Causation / Physical acts]
    B --> D[Map Rate-Independent Constraints: Downward Causation / Rules & DNA]
    C --> E[Synthesize Circular Causality]
    D --> E
    E --> F[Acknowledge Operational Closure of the System]
    F --> G[Introduce Orthogonal Perturbations / Seduction]
    G --> H{Does the system's structure accept the trigger?}
    H -- Yes --> I[Structural Coupling: System adapts internally]
    H -- No --> J[Bifurcation or Error: Model divergence]
    I --> K[Observe new Consensual Domain]
    J -.-> B

9. Cognitive, Cultural, and Philosophical Critics (Lakoff, Pirsig, Postman)

The Logic: This process model addresses the cognitive and cultural lenses through which we interpret complexity. It recognizes that our reasoning is unconscious, metaphorical, and shaped by our environments. When a situation breaks down into “crazy talk” or intractable political conflict, traditional problem-solving leads to “stuckness”. The process requires stopping, deconstructing the hidden semantic environment, acknowledging value rigidity, and reframing the metaphors to create a new cognitive reality.

graph TD
    A[Observe Intractable Conflict or Dysfunction] --> B[Enter Participant-Observer Stance: Suspend Ideology]
    B --> C[Analyze the Semantic Environment & Context]
    C --> D[Deconstruct Surface Language & Vocabulary]
    D --> E[Identify Underlying Conceptual Metaphors & Roles]
    E --> F[Expose Hidden Moral Worldview: e.g., Strict vs. Nurturant]
    F --> G{Is there Value Rigidity / 'Stuckness'?}
    G -- Yes --> H[Accept 'Stuckness': Clear mind, stare without preconceptions]
    G -- No --> I[Apply Second-Order Reframing]
    H --> I[Apply Second-Order Reframing: Change the Metaphor]
    I --> J[Implement Cognitive Policy: Shift the Narrative]
    J --> K[Wait for Dynamic Quality / New Understanding to Emerge]
    K -.-> A