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# 【第8回】頭の中がぐちゃぐちゃ？思考のレンズ「DSRP」で世界の見方を変えよう！ (Part 8: Is your head in a jumble? Change how you see the world with the DSRP thinking lens)

## Details

**Authors** めいさん (Mei)

**Year** 2026

**Publisher** note (note.com), in the author's series "Systems Engineering as a Thinking Method"

**Kind of work** article

**Discipline** Engineering

**Secondary disciplines** Systems Science

**Kind of engagement** public

**Applied** false

[Read it](https://note.com/quiet_quoll5806/n/n44ab6edd5cfe)

## In authors' words

### What they set out to do (purpose)

To give general readers a usable thinking lens for everyday complexity by teaching the four DSRP patterns, and to gather up the topics covered earlier in the author's systems engineering series, which the post says DSRP bundles together.

### How they did it (methods)

A didactic post in five parts: an opening on why single fixes fail against complex problems; a definition of each of the four patterns with its two elements and an illustration; a statement of the benefits of using them; a worked example applying all four to one situation; and a summary with a four-verb mnemonic, followed by a reference list and the author's biography.

### What they found (results)

The author concludes that DSRP is an everyday and universally applicable thinking tool, and that holding the four lenses in mind lets a person find structure in situations that otherwise feel chaotic.

## Commentary

### In short

A Japanese systems engineering practitioner teaches the four DSRP patterns to a general readership, attributing them to Derek Cabrera and to the INCOSE Systems Engineering Handbook, and works all four through a single example: a high school class running a takoyaki stall at a culture festival.

### In more detail

The post is the eighth installment of a Japanese-language series on systems engineering as a way of thinking, and it treats DSRP as the structure that ties the earlier installments together. Cabrera is named in the body text, described as a systems theorist and cognitive scientist, and linked to his Wikipedia entry; the post's authority for the framework, however, is the INCOSE Systems Engineering Handbook, fifth edition, which it says presents DSRP as the four universal rules underlying the various approaches to systems thinking. The reference list carries the handbook alongside ISO/IEC/IEEE 15288, ISO/IEC/IEEE 42010, the SEBoK, and the DSRP encyclopedia entry. Laura Cabrera is not mentioned, and Systems Thinking Made Simple does not appear. Each pattern is given its two elements. Distinctions are drawn by asking what something is and what it is not, with the gloss that awareness of a self entails awareness of a not-self. Systems are part and whole at once. Relationships are action paired with reaction rather than a one-way arrow. Perspectives are a viewpoint together with what is seen from it, and the post emphasizes switching between them. The worked example is a high school class running a takoyaki stall at a culture festival, and each pattern does separate work on it. The distinction question separates what the class controls, its equipment and its staff, from the shared environment of hallways, water, and electrical outlets, which settles where responsibility ends. The systems question splits the stall into cooking, serving, and cashier roles that compose one operation, and asks whether a failure sits in a part or in how the parts are joined. The relationship question takes a hundred-yen price cut as an action and traces its reactions: more customers, then ingredient shortages, then a slower line. The perspective question sets the customer's view, cheap food but a long wait, against a visiting teacher's safety-inspection view, which surfaces blocked hallways and missing bins that none of the other three questions reached.

### Response

The post states each pattern correctly, including both elements of each, which is the detail most short introductions drop. Its choice of example is better than it looks. A takoyaki stall is small enough that a reader can hold all of it, and the post uses it to make the four patterns do four different jobs rather than four restatements of one: the boundary question settles authority, the part-whole question localizes a failure, the action-reaction question turns a price cut into a stock shortage, and the perspective question produces the fire-safety view that no amount of work on the other three would have produced. That last point is the one worth noticing, because it demonstrates rather than asserts why a perspective is a pattern and not a courtesy. Where the post stops short is in presenting the four as a list of lenses to apply in turn. It does not show them composing: a relationship treated as a distinction, a perspective taken on a system, a part that is also a whole at the next scale down. Grounding the account in the INCOSE handbook rather than the theory's own literature is probably why, since the handbook states the four rules without the dynamics that make them generative. A reader finishing this post can ask four good questions, which is a real gain, and will not yet know that the questions can be aimed at each other.

**Patterns it shows** D, S, R, P

**Added** 2026-11-02

**How to cite this** めいさん (Mei) (2026). 【第8回】頭の中がぐちゃぐちゃ？思考のレンズ「DSRP」で世界の見方を変えよう！ (Part 8: Is your head in a jumble? Change how you see the world with the DSRP thinking lens). note (note.com), in the author's series "Systems Engineering as a Thinking Method".