Everyone’s building design systems. You’ve probably heard they’re the key to efficiency, consistency, and scalability. That they save time and money. That they make designers and developers sing Kumbaya around a shared source of truth.
None of that is wrong. But it’s incomplete.
The hard truth? Most design systems fail. Not because the components are ugly or the documentation is sparse. They fail because the people building and using them don't understand the real work involved. They treat it like a one-off project, not an evolving product.
Let’s look at the common mistakes and how to dodge them.
1. Treating It Like a Project, Not a Product
This is the root of most design system failures. You launch it. You tick the box. Then you move on to the *real* work. But a design system isn't a deliverable. It’s a living, breathing entity that needs continuous care and feeding.
Think of it like a product your agency builds for a client. It needs:
- A roadmap.
- Ongoing maintenance.
- Bug fixes.
- Feature updates based on user needs.
- Clear ownership.
If you don’t have a plan for its lifecycle, it will wither.
2. Over-Engineering the Initial Build
The temptation is to build *everything* for *everyone* from day one. You want the perfect, comprehensive system that anticipates every possible future need. This leads to:
- Scope creep.
- Bloated code.
- Overwhelming documentation.
- Analysis paralysis.
The result? A system that’s too complex to use, too slow to build, and too difficult to maintain. It becomes a burden, not a benefit.
Start Small, Think Big
Focus on the core needs of your current projects. What are the most frequently used components? What are the biggest sources of inconsistency? Build those first.
You can always add more later. A modular approach allows for growth without crippling the initial launch. Prioritize impact over comprehensiveness.
3. Neglecting the Human Element
A design system is a tool for people. If people don’t understand it, don’t trust it, or don’t *want* to use it, it’s worthless. This mistake takes many forms:
Lack of Buy-In
Leadership might champion the idea, but if the designers and developers who will actually *use* it aren't involved and don't see the value, adoption will be slow, or non-existent.
Poor Onboarding and Training
Just dumping a link to the design system isn’t enough. Teams need clear guidance, training sessions, and ongoing support to integrate it into their workflows. Show them *how* it makes their lives easier.
Ignoring User Feedback
Your design system users are your internal clients. They will encounter friction points, find bugs, and have ideas for improvement. If you don’t have a mechanism to collect and act on this feedback, you’re building in a vacuum.
Documentation That’s Too Technical or Too Vague
Documentation should be accessible to everyone who needs it. Avoid overly technical jargon for designers and avoid oversimplifying to the point of uselessness for developers. Strike a balance. Clear examples, usage guidelines, and do’s/don’ts are critical.
4. Siloed Development and Maintenance
Who owns the design system? If the answer is vague, or if it’s solely the responsibility of one person or a small, isolated team, it’s a recipe for disaster. The system will quickly become outdated and out of sync with actual project needs.
A successful design system requires collaboration between design and engineering. It needs:
- Shared Ownership: Both disciplines must feel responsible.
- Clear Contribution Process: How do new components get added? How are existing ones updated?
- Regular Syncs: Dedicated time for design and dev to review, plan, and troubleshoot.
This isn't just about code. It's about shared understanding and process.
5. Ignoring Accessibility from the Start
This is a non-negotiable. Building a design system without accessibility baked in from the ground up is like building a house without considering the foundation. You’ll have to go back and fix it, and it’s far more expensive and difficult.
Accessibility needs to be a core requirement for every component. This means:
- Ensuring sufficient color contrast.
- Implementing proper ARIA attributes.
- Designing for keyboard navigation.
- Considering different screen sizes and zoom levels.
Make accessibility checks part of your component definition and review process. Don't treat it as an afterthought.
6. Not Defining Governance and Contribution Models
Who decides what goes into the system? Who approves changes? Who maintains it? Without clear governance, the system can become chaotic.
Consider these questions:
- Decision-Making Authority: Who has the final say on component design, functionality, and standards?
- Contribution Guidelines: How can team members propose new components or changes? What’s the review process?
- Versioning Strategy: How will updates be released? How will teams migrate to new versions?
A well-defined model ensures the system evolves predictably and stays aligned with the agency’s or team’s strategic goals.
7. Failing to Measure Impact
How do you know if your design system is actually working? If you can’t measure its impact, you can’t justify the ongoing investment or identify areas for improvement.
What to measure?
- Adoption Rate: How many projects are using the system?
- Time Savings: Can teams estimate how much faster they’re building UIs?
- Consistency Metrics: Are there fewer design deviations across projects?
- Reduction in Bugs: Are there fewer UI-related bugs reported?
- Developer/Designer Satisfaction: Are the people using it happier and more productive?
Gathering this data, even anecdotally at first, provides crucial insights and helps build a case for continued support.
Where Revue Fits In
Building a design system is one thing. Ensuring it’s used effectively across a portfolio of clients and projects is another. This is where centralized feedback and clear approval workflows become critical.
When designers and developers are building with components from your system, they need a streamlined way to get client feedback and approvals. Trying to manage this through endless email chains or scattered documents is a recipe for disaster. It leads to:
- Misinterpreted feedback.
- Missed revisions.
- Endless back-and-forth.
- Difficulty tracking what’s approved and what’s not.
Tools like Revue help by providing a single source of truth for feedback on creative work. When clients can comment directly on specific versions, mark up designs, and give clear approvals, the entire revision process becomes transparent and manageable. This ensures that the components you build in your design system are being used correctly and that the final output meets client expectations without unnecessary churn.
It’s about connecting the foundational work of your design system to the day-to-day reality of client delivery.
Final Thought
A design system isn’t magic. It’s hard work. It requires discipline, collaboration, and a commitment to treating it as an evolving product, not a finished project. Are you building a system, or just a style guide?
Frequently asked questions
What's the biggest mistake when starting a design system?
The biggest mistake is treating a design system like a one-off project instead of an ongoing product. It requires continuous maintenance, updates, and user feedback to remain valuable and relevant.
How can we ensure our design system is adopted by the team?
Ensure adoption by involving your team (designers and developers) early in the process, providing clear training and onboarding, and actively seeking and acting on their feedback. Demonstrate how it simplifies their work.
Is it better to build a comprehensive design system from the start or start small?
It's almost always better to start small and iterate. Focus on the most critical components and patterns first. Over-engineering at the start leads to complexity, delays, and potential abandonment. You can always expand it later.
How does a design system relate to client feedback and approvals?
A design system provides the building blocks for your creative work. Centralized feedback and approval tools ensure that these components are used consistently and that client revisions are managed efficiently, preventing confusion and rework.