---
title: "Ch 17 — The Market Test"
description: "Part III chapter arguing that the VSM community's strongest public warrant, that no failed case has ever been found, describes how the field records its work…"
url: "https://wiki.cybernetic-futures.org/punch-and-judy/part-03-false-friends-and-enemies/ch17-the-market-test"
modified: "2026-11-12T15:26:25.920Z"
language: "en"
site: "Cybernetic Futures"
---

# Ch 17 — The Market Test

[Chapter content](https://wiki.cybernetic-futures.org/punch-and-judy/part-03-false-friends-and-enemies/ch17-the-market-test/ch17-the-market-test-content) · Overview diagram

# Ch 17 — The Market Test

**Part III — False friends and enemies.** The chapter argues that the warrant published by the VSM community closest to the model — that in fifty years nobody has found a case in which the model failed — is a statement about the field's recording practices wearing the clothes of a statement about its model.

## The question
If the defects catalogued earlier in the book never cost anyone anything, who was standing around not charging for them?

## The finding
The chapter examines Metaphorum, whose website states that after fifty years no one has found a case study in which the VSM has failed, and Schwaninger and Scheef, who record the same absence from a different tradition. The chapter reads the two sentences together into a loop, and flags the reading as its own: neither source makes the joint claim. Failures are not reported, so none is found, so the record looks clean.

It then asks what a failure would have to mean. A title-level search reported no definition of a failed VSM application, so the chapter sets out four candidate senses — descriptive, predictive, interventional and engagement failure — and finds the first three have never been instrumented, while only the last is observable and "almost never reaches print." The claim, it concludes, reports the design of the observation system, not the model.

The chapter acknowledges the practitioner network's operative test — Hoverstadt's remark that a client who is not helped does not ask you back — as a real and fast feedback loop, more than most consulting frameworks submit to, before arguing it is selected on the outcome variable in the direction that hides failure: the practitioner who loses the account writes nothing. It notes SCiO's public case library states its inclusion criterion openly as case studies of successful application, and limits its own count to the twelve entries read in full.

It states plainly what it does not establish: that the model has failed anywhere, or that practitioners are wrong about their engagements. The warrant, it says, is the one thing the exercise cannot leave standing.

## What the chapter puts at risk
1. Define a failed VSM application in four operational lines, each with the evidence that would establish it, and a preamble naming which notion of viability the definition uses.
2. Invite the practitioner network to enter its terminated engagements anonymized against it, in the register proposed for Chapter 30, with a twelve-month amnesty.
3. If the register stays empty with the definition in place, treat the observed absence as the finding.

## Beer locators
BOTF 1981: 323, 350; TBYT 2009: 148, 150.

## Status
Draft, *Punch and Judy* v0.5.0 — **not project canon**, and not published. The chapter marks several claims as limited or provisional: the failure-definition search rests on a title screen only; the count is stated for the twelve entries read, not for the library; the Espinosa 2025 characterization rests on an abstract alone and is flagged unverified; the "publication-bias admission" phrasing is identified as the authors' own interpretation.

## Related
[Punch and Judy — Overview](https://wiki.cybernetic-futures.org/punch-and-judy/overview), [Viable System Model](https://wiki.cybernetic-futures.org/pure-vsm/entities/viable-system-model), [Stafford Beer](https://wiki.cybernetic-futures.org/pure-vsm/entities/stafford-beer), [Think Before You Think](https://wiki.cybernetic-futures.org/pure-vsm/entities/think-before-you-think), [Ch 18 — The Test That Could Not Lose](https://wiki.cybernetic-futures.org/punch-and-judy/part-03-false-friends-and-enemies/ch18-the-test-that-could-not-lose), [Ch 28 — What Would Count Against It?](https://wiki.cybernetic-futures.org/punch-and-judy/part-05-put-model-at-risk/ch28-what-would-count-against), [Pathologies of viable systems](https://wiki.cybernetic-futures.org/pure-vsm/concepts/pathologies-of-viable-systems)