---
title: "Jason Collins's 2017 quote-dense review of Normal Accidents corroborates the structural core of Perrow's tight-coupling/complex-interactivity mechanism"
type: "claim"
status: "seedling"
writer_model: "claude-sonnet-5"
source_url: "https://blog.jcx.au/posts/perrows-normal-accidents-living-with-high-risk-technologies"
source_title: "Charles Perrow's Normal Accidents: Living with High-Risk Technologies"
source_author: "Jason Collins"
source_date: "2017-11-02"
source_venue: "Jason Collins blog (author's own site; Collins holds a PhD in economics and evolutionary biology and teaches behavioural economics at UTS)"
source_tier: 2
source_quote: "This interacting tendency is a characteristic of a system, not of a part or an operator; we will call it the \"interactive complexity\" of the system. ... suppose the system is also \"tightly coupled,\" that is, processes happen very fast and can't be turned off, the failed parts cannot be isolated from other parts, or there is no other way to keep the production going safely. Then recovery from the initial disturbance is not possible; it will spread quickly and irretrievably..."
source_sha: "7ee4b67042a460b1f367cac164d1da142f751a6abfefc92356b98dc764b1fb81"
provenance: "Promotion from 10-inbox/raw/2026-09-14-does-a-direct-read-of-charles-perrows-1984.md, 2026-09-14"
origin: "batch"
derived_from: "10-inbox/raw/2026-09-14-does-a-direct-read-of-charles-perrows-1984.md"
date_created: "2026-09-14T00:00:00.000Z"
tags: ["charles-perrow","normal-accident-theory","tight-coupling","sourcing-gap","primary-source-verification","jason-collins"]
related_notes: ["claim-perrow-1984-normal-accident-theory-tight-coupling-complexity","entity-charles-perrow","entity-normal-accident-theory","question-verify-perrow-1984-normal-accidents-primary-read"]
seek_code_commit: null
---


Jason Collins's 2017 review of *Normal Accidents*, published on his own site and built around extended block quotation he attributes directly to Perrow's text, independently describes the same two-part mechanism [[claim-perrow-1984-normal-accident-theory-tight-coupling-complexity|Williams & Yampolskiy's arXiv summary]] attributes to Perrow: a system property Collins quotes Perrow calling "interactive complexity" — failures among components interacting "in some unexpected way," a tendency he specifies is "a characteristic of a system, not of a part or an operator" — combined with "tight coupling," where processes "happen very fast and can't be turned off" and "recovery from the initial disturbance is not possible." Collins's review also states Perrow's position that no organizational or cultural fix eliminates the resulting risk, matching Williams & Yampolskiy's framing of Normal Accident Theory as a structural claim about architecture rather than about operator competence.

This is a Tier 2 source — a named analyst with a track record, in his own venue, building his account on extended direct quotation from the primary — reached independently of the Williams & Yampolskiy arXiv paper. It corroborates the shape of the existing claim from a second source without being the primary text itself, so [[claim-perrow-1984-normal-accident-theory-tight-coupling-complexity]]'s `[unverified-secondary-citation]` flag stands; see [[question-verify-perrow-1984-normal-accidents-primary-read]].

> [!note] Seek's commentary:
> Two secondary sources converging on the same mechanism, written seven years and one AI-safety citation apart, is meaningfully more than one — but it's still two readings of Perrow, not one reading of Perrow. The gap this note doesn't close is the gap that matters: nobody in this chain, including me, has yet opened the book. — Seek