How Modular Design Boosts Agile Online‑Offline Product Iteration
This article explains the origins and principles of modular design, outlines its four key attributes—agility, flexibility, richness, and extensibility—and demonstrates how applying a modular approach can accelerate product updates and improve user experiences across online and offline scenarios through real‑world case studies.
What Is Modular Design?
Modular design originated in the manufacturing industry in 1964 when the Archigram team proposed the "plug‑in city" concept. After more than half a century, the idea has spread to many fields, including digital product design.
Why Adopt Modular Design?
By decomposing product processes, information structures, interaction methods, and visual forms into independent elements, modular design enables flexible recombination of components, reduces design cost, shortens development cycles, and improves overall efficiency.
Four Core Principles
Agility
Flexibility
Richness
Extensibility
Practical Examples
In a mobile app, hundreds of functional points can be split into modules. When a major version upgrade is needed, separating modules reduces coupling, allowing selective updates without overhauling the entire system.
For a pizza‑ordering feature, instead of creating a separate function for a "double‑flavor" pizza, the design splits the selection into two independent cards that can be combined, illustrating agile modular upgrades.
ARK’s "Le Kaisa" case shows how modularity improves agility by updating individual modules rather than the whole product.
In the KFC takeaway system, each bag or cabinet is treated as a module, enabling scalable extensions for different pickup scenarios.
Luckin Coffee’s app evolved from a simple ordering tool to a platform with e‑commerce, promotions, and personalized modules, using a "building‑block pool" to reorganize the homepage into six flexible zones.
The League of Legends live‑viewing experience required seamless integration of online and offline audiences; modular design prevented the need to redesign the entire experience for each new scenario.
Methodology: Top‑Down and Bottom‑Up
From a top‑down perspective, designers start with a high‑level view of the product, breaking it into logical modules. From a bottom‑up view, each atomic element (like a LEGO brick) is identified and later combined to form larger functional units, allowing systematic testing and iteration based on user data.
Conclusion
Modular design enables the creation of diverse interfaces, products, and services with high reusability, supporting rapid, low‑cost iteration and fostering a systematic design mindset.
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