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MENTAL MODEL · M1259

Interface Segregation Principle

Interface Segregation Principle
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Version 1.0.0 · Updated 2026-07-30

CORE DEFINITION

Clients should not be forced to depend on methods they do not use. Instead of a large interface, create multiple specialized interfaces.

SCAFFOLDING EFFECT

psychology

Reduce cognitive load

On-demand allocation. Do not give users a remote control with 100 buttons if they only need power and volume. Overexposing information adds noise and risk.

anchor

Anchor fast decisions

It is one of the SOLID principles: fat interfaces force clients to depend on methods they do not need, increasing coupling, noise, and the scope of changes. Splitting into multiple fine-grained, single-responsibility specialized interfaces allows clients to depend only on the contracts they actually use, reducing coupling and change risk.

MINIMUM ACTION

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Practice this model in one real situation:

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Source support: Explicit

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    en.wikipedia.orghttps://en.wikipedia.org/wiki/Interface_segregation_principleZH · Explicit
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