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Have the impact of changes been assessed and the reuse of necessary components considered?

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frontend
コンポーネント設計
ui設計
SaaS 設計
影響範囲
tech

Have the scope of changes been organized, and has the reuse of necessary components been considered?

Background and Overview

UI changes have repercussions on logic, styles, and state management, so it is important to organize the scope of impact in advance and design with a reusable structure.

Designing for reusability leads to better scalability across other screens, maintainability, and a reduction in QA burden.

Examples

  • Generalizing input forms as an EditableForm to be reused in both creation and editing screens.
  • Extracting currency display components to be shared as a Currency component in various places.
  • Gradual UI replacement using Feature Flags.

Common Pitfalls

  • Implementations of the same component are scattered in multiple places, meaning bug fixes cannot be completed in one location.
  • Side effects caused by UI changes are not evaluated, leading to unexpected bugs after release.
  • The structure of state management libraries (such as Redux or Vuex) breaks down, causing logic to become fragmented.

FAQ

Q. How should I identify the scope of impact?

A. It is recommended to check comprehensively based on the DOM structure, state management, and dependent APIs, utilizing Storybook and incorporating test perspective reviews.

Q. Should all UI be generalized?

A. Since generalization also incurs costs, it is best to prioritize components expected to be reused across two or more screens.

📘 This article is part of the SaaS Design Review Checklist (2025 Edition).

Design Category: 🎨 UI & Notifications
Level: Structure (Architecture, Principles, Responsibility Organization)
Recommended for: Design beginners / Teams currently in the design phase / Reviewers

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