The Necessary Tangle

Foundations | about 35 minutes | free

Systems concepts: make your boundary inspectable

Construct and challenge two systems-of-interest descriptions without confusing your model with the situation.

Framework link: Systemic thinking & systems concepts. Apprenticeship practice links: K1, S1, S2, S3, S9.

What this exercise can and cannot establish

A first rehearsal of boundaries, relationships, perspectives, feedback and emergence. It is not a complete treatment of systems philosophy or complexity science.

This is original learning material, not a reproduced official course. Mechanical checks have determinate answers within the stated case. Worked comparisons for open judgements show defensible reasoning, not the only possible model. Specialist pedagogical review is not recorded.

The case

Fictional case: Riverbank Library has a computer-booking service. Staff count a booking as successful when a slot is allocated. In one week 80 slots are allocated, 30 are not used, and 20 visitors leave without completing the online application they came to make. The booking form is online. A community group helps people who cannot use it; this work is absent from the library's statistics. Managers propose reducing staff assistance to allocate more slots. Staff predict that visitors will return repeatedly for help. Neither prediction has yet been tested.

Work through it

Use paper, your own drawing tool or the notes below. Attempt each step before opening its comparison. Describe a diagram in words when that is more accessible.

  1. 1. Draw an OU-style systems map for the booking manager's system of interest.

    Produce: A titled containment map with one stated purpose and boundary.

    Compare your work for step 1

    One defensible title is 'Allocating computer slots'. Within its boundary place the booking process, slot records and allocation staff; put visitors, the community group and application websites in the environment. Containment means inclusion, not causation or seniority. This boundary can be useful for allocation work, but it excludes whether a visitor completes an application. Explain that exclusion rather than pretending the map covers the whole situation.

  2. 2. Construct a second map from a visitor's purpose.

    Produce: A second boundary and a short explanation of what changed.

    Compare your work for step 2

    A visitor may define the activity as 'Getting an application completed'. Include access to equipment, assistance, credentials, information and the application process. The library is now one contributor, not the centre of the universe. Include the community group's work. Different maps need not be merged into one allegedly objective map: their purposes differ.

  3. 3. Write a testable feedback hypothesis about reduced assistance.

    Produce: One closed causal sentence and one observation that could challenge it.

    Compare your work for step 3

    Less assistance may increase incomplete applications, which may increase repeat visits, which may consume assistance time and further reduce available assistance. This is a proposed reinforcing loop, not a fact established by the numbers. Compare repeat visits and assistance time before and during a small reversible change. A fall in repeats despite reduced assistance would challenge the proposed mechanism.

  4. 4. Locate yourself in the inquiry.

    Produce: A two-sentence observer note.

    Compare your work for step 4

    For example: 'I selected completed applications as important because I am taking the visitor's purpose seriously. My questions and reporting may make staff prioritise that measure, so I will ask who loses access or becomes invisible under this new boundary.' Naming the observer does not make every account equally adequate; each still needs evidence and a stated use.

Check the basic distinctions

These checks test the supplied case, not your overall competence. Open answers and model variants still need your judgement.

1. Does 80 allocated slots establish 80 successful visitor outcomes?

Answer and reasoning 1

No: allocation and completion are different observations

Allocation is an output. The case does not establish 80 completed applications, nor does it establish that all bookings failed. The figures may overlap; do not subtract them as though they were disjoint categories.

2. What does a boundary in an OU systems map primarily show?

Answer and reasoning 2

An editorial inclusion in a stated system of interest

Containment identifies inclusion at the chosen level. Causal influence and authority require other representations or explicit additional notation.

3. Which observation supports emergence without claiming magic?

Answer and reasoning 3

Repeated local booking decisions can generate an access pattern nobody intended

An aggregate pattern can arise through interactions rather than anyone designing it. That does not imply universal unpredictability or the irrelevance of components.

Repair a defective model or claim

The map places every organisation in one circle labelled 'the whole system' and claims that everyone shares the library's success measure.
Compare your repair

Give the map a purpose, author, boundary and date. Distinguish an allocation perspective from an application-completion perspective. Record disagreement and missing information. 'Whole' is a claim to examine, not a label that removes the boundary problem.

Try a changed case before looking

A new manager counts only applications completed on library computers. What exclusion could this introduce, and how would you test it?

Compare the changed case

People who complete applications later at home or with the community group disappear from the outcome measure. So may people prevented from attending. Ask a sample of visitors about later completion and contact the community group with permission. Do not solve the exclusion merely by broadening a diagram without changing how evidence is collected.

Review the process, not just the score

A different model can be defensible when its purpose, assumptions and reasoning are explicit. A contradiction, incorrect unit, invented fact or unacknowledged change of purpose needs repair. Keep both your first attempt and revision.

Keep your attempt

No sign-in or submission is required. Notes are not sent by this practice tool. Use fictional information, not identifiable client or learner data. Saving stores this page's attempt only in this browser; clearing browser data can remove it. Export a copy to keep it elsewhere.

External resources and their limits

The complete original case above is free. Links below distinguish exercises from explanations, recordings, software and paid study. Reading a page or drawing in a tool is not itself a model check.

OU: drawing systems maps, SAQ 3 and Activities 19-22

Free | Exercise with answer/commentary

Attempt SAQ 3 before opening its answer. Draw your own map for Activities 19-22, then compare the author's choices. Different justified boundaries need not match the example.

What was checked, and what was not

Tasks, defective maps, answer text and worked revisions inspected. Historic Child Support Agency case, not current policy guidance.

Research date: 2026-09-07

OU: systems maps, updated tutorial

Free | Tutorial

Check containment and boundaries. An OU systems map is not a causal-loop diagram; do not add untyped causal arrows to it.

What was checked, and what was not

Updated 2021 tutorial page and diagram conventions inspected; playback not independently tested.

Research date: 2026-09-07

OU: systems diagramming

Free | Guided practice with legacy limitation

Use the text conventions and printable activities. Use the newer systems-map tutorial below instead of the Flash element.

What was checked, and what was not

Course content inspected. An old Flash activity is unavailable; do not depend on it.

Research date: 2026-09-07

SCiO systems practice courses

Paid | Recorded courses with exercises

Choose the named introduction or core module matching your method. Check current price, access arrangements and feedback provision before paying.

What was checked, and what was not

Public listings inspected for VSM, SSM, CSH, SD, Patterns of Strategy, Mosaic and systems laws. Paid exercises and marking were not accessed.

Research date: 2026-09-07

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