The Role of Quality Assurance in UX Design

Quality assurance engineer looking at UX design

In the era of digital products and services, user experience (UX) design plays a pivotal role in shaping how users interact with technology. From mobile apps to websites, the design process aims to create intuitive, efficient, and enjoyable experiences for users. However, ensuring that these experiences meet user expectations requires quality assurance (QA) processes. Let's delve into the fundamentals of UX design, why QA is indispensable, essential QA checklists for designers, and illustrative examples of both good and bad UX design.

What is UX design?

UX design, or user experience design, is a multidisciplinary field focused on creating products, systems, or services that are user-friendly, intuitive, efficient, and enjoyable to use. It encompasses a range of elements including user research, interaction design, information architecture, usability testing, and visual design.

The goal of UX design is to understand the needs, behaviors, and preferences of users and then to design products or systems that meet those needs effectively. This involves considering the entire user journey, from the initial interaction with a product or service to the completion of a task or goal.

UX designers use various techniques and methodologies to gather insights about users, such as interviews, surveys, observation, and analytics. They then use this information to create wireframes, prototypes, and mockups to visualize and test different design solutions. UX design aims to create products and experiences that not only meet user needs but also engage users, leading to increased satisfaction, loyalty, and success for the product or service.

In other words, UX covers the entire journey customers experience as they interact with the brand. It involves factors like:

  • How easy it is to navigate the website.
  • How appealing the visual elements are—fonts, colors, structure.
  • How simple it is to complete actions, like, the checkout process.

It is safe to say that UX design is an essential part of the company’s brand identity.

Why QA is necessary in UX design

Person browsing an online shopping website

Picture this, you're browsing a shopping website, excited to find a great deal on a new pair of sneakers. You spot a stylish pair listed at a tempting $49.99. Eager to make the purchase, you click on the sneakers to learn more, add them to your basket, and proceed to checkout. You fill in your user details, such as name, address, and contact information, and then move on to the shipping method section.

Realizing you need to correct or add some information, you navigate back to the user details section using the website's built-in navigation. Upon returning, you discover that all your previously entered information is gone, and you have to re-enter everything from scratch. Frustrated and feeling a bit lazy, you abandon the purchase, deciding that maybe you don't really need the sneakers after all.

The frustration and inconvenience caused by having to re-enter information leads to a poor user experience, which can significantly affect user satisfaction and conversion rates. Had the website undergone UX testing before going live, this issue could have been identified and fixed early on.

Such bugs in a purchasing cycle are one of the reasons why quality assurance (QA) is essential in UX design. Here's a complete list of reasons:

  1. To ensure usability: QA helps ensure that the user experience design meets usability standards. QA testers evaluate the functionality of the design to ensure that users can easily navigate through the interface, complete tasks efficiently, and achieve their goals without encountering obstacles or confusion.
  2. To identify bugs and issues: QA testing uncovers bugs, glitches, and usability issues that may affect the user experience. By identifying and addressing these issues early in the design process, UX designers can prevent negative user experiences and improve the overall quality of the product.
  3. To validate design decisions: QA testing validates the effectiveness of design decisions. By gathering feedback from users during testing, UX designers can assess whether their design choices align with user expectations and preferences. This feedback helps designers refine and iterate on their designs to better meet user needs.
  4. To ensure consistency: QA testing ensures consistency across different devices, platforms, and browsers. UX designers need to ensure that the user experience remains consistent regardless of the device or platform users are using. QA testers validate that the design functions as intended across various environments, minimizing discrepancies and ensuring a cohesive user experience.
  5. To improve accessibility: QA testing helps ensure that the user experience is accessible to all users, including those with disabilities. QA testers evaluate the design for accessibility standards, such as Web Content Accessibility Guidelines (WCAG), to ensure that it is usable by people with diverse needs and abilities.
  6. To enhance user satisfaction: Ultimately, QA testing contributes to enhancing user satisfaction. By identifying and fixing issues that detract from the user experience, QA ensures that users have a positive interaction with the product, leading to higher satisfaction, retention, and advocacy.

QA checklist for UX designers

For UI/UX Engineers, a comprehensive QA process should include several important practices. Let's explore the brief checklist that every digital product should meet.

Standards compliance

By integrating these actions into your development process, you can ensure that your digital product is compliant with industry standards, providing a better, more accessible, and more reliable user experience.


  • Check that the design follows Accessibility regulations such as the WCAG—Web Content Accessibility Guidelines, accommodating users with disabilities.
  • Conduct user research with people with various disabilities and create diverse personas.
  • Implement inclusive design principles, offering customizable features like font sizes, color contrasts, and layouts, and alternatives for content, like text descriptions for images (alt text), transcripts for audio content, and captions for videos.
  • Simplify navigation, ensure keyboard accessibility, and provide error prevention and recovery.
  • Test compatibility with screen readers and integrate voice commands.
  • Do accessibility testing, for example, use automated tools, perform manual testing, and include users with disabilities in usability testing. You might also be interested in reading more about the key differences between usability testing, UX testing and accessibility testing.
  • Provide team training, conduct regular audits, and create feedback loops for continuous accessibility enhancements.
  • Use Google Chrome extensions to help software testers test the website for accessibility.

Making your products accessible is important because it ensures that people with disabilities can access and benefit from digital content, helps avoid legal issues, expands the user base, and often leads to better overall user experiences. Accessible designs are also favored by search engines and reflect a company’s commitment to ethical practices, ensuring long-term relevance and usability.

Responsive design

  • Use flexible grid layouts that adapt to different screen sizes and orientations. Utilize CSS frameworks like Bootstrap or Foundation to simplify the implementation.
  • Implement responsive images using the srcset attribute and CSS media queries to load appropriate image sizes based on the user's device.
  • Use relative units like ems, rems, or percentages for font sizes to ensure text scales appropriately on different devices.
  • Apply CSS media queries to adjust the design for various screen sizes and resolutions. Create breakpoints that match common device widths, such as mobile, tablet, and desktop.
  • Design the mobile version of your site first and progressively enhance it for larger screens. This approach ensures that the core functionality and content are accessible on all devices.
  • Include the viewport meta tag in your HTML to control the layout on mobile browsers and ensure proper scaling and rendering.
  • Regularly test your digital product on various devices (iPhone SE, XR, 12 Pro, Max, Pixel 7, Samsung Galaxy S8, S20 Ultra, iPad Mini, Air, Surface Pro 7, Due, Galaxy Z fold 5, etc.)  and browsers (e.g., Chrome, Firefox, Safari, Edge) to ensure it functions correctly and provides a consistent user experience.

It's important to note that Google has long supported responsive web design (RWD), especially following a major update on March 21, 2015, which gave higher rankings to mobile-friendly sites. Implementing responsive design can therefore enhance your company's SEO and improve its chances of appearing on the first pages of Google Search results.


  • Combine files, use CSS sprites, and reduce external resources to lower the number of HTTP requests.
  • Compress and resize images, and instead of PNG or JPG use modern formats like WebP for faster loading times.
  • Set cache headers for static resources and distribute content via CDNs to enhance delivery speed.
  • Minify CSS, JavaScript, and HTML files, and use compression techniques like Gzip or Brotli to reduce file sizes.
  • Use lazy loading for non-critical resources and load JavaScript asynchronously, deferring non-critical scripts.
  • Write efficient code, remove unused CSS/JavaScript, optimize database queries, and regularly clean up the database.
  • Use tools like Google PageSpeed Insights or Loadero to regularly test and analyze performance, and optimize server configurations and hardware where necessary.

Optimizing the performance of your digital product is important because it directly impacts user experience, engagement, and satisfaction. Faster loading times, for example, enhance usability, reduce bounce rates, and increase user retention. Additionally, performance optimization improves SEO rankings, as search engines favor fast-loading sites, leading to better visibility and more traffic. It also ensures scalability and reliability, reducing the risk of crashes and downtime, and ultimately contributing to the overall success and competitiveness of your digital product.


  • Review the design for potential security vulnerabilities, such as insecure data transmission or storage practices.
  • Follow best practices for secure coding to prevent common vulnerabilities like SQL injection, cross-site scripting (XSS), and buffer overflows.
  • Encrypt sensitive data to protect it from unauthorized access.
  • Perform regular security testing, including penetration testing, vulnerability scanning, and code reviews, to identify and address potential security issues.
  • Regularly update all components, including third-party libraries and frameworks, to protect against known vulnerabilities.
  • Provide ongoing security training for your development team to stay informed about the latest security threats and best practices.
  • Ensure that all APIs are securely designed, with proper validation, authentication, and encryption. API testing is useful for this.
  • Ensure that sensitive user information, such as passwords or payment details, is handled securely and protected from unauthorized access and that users only have access to the data and functions they need.

Considering security when designing digital products is crucial in order to protect sensitive data, maintain user trust, and ensure the integrity of the system. Security measures help prevent unauthorized access, data breaches, and cyberattacks that can result in financial loss, legal consequences, and damage to a company's reputation. By prioritizing security, developers can safeguard personal information, comply with legal and regulatory requirements, and create a safer, more reliable user experience.

Codebase integrity

  • Use a version control system (e.g., Git) and maintain comprehensive documentation for the codebase, including architecture, APIs, and key design decisions to facilitate collaboration among developers.
  • Develop and maintain a suite of automated tests, including unit tests, integration tests, and end-to-end tests, to catch bugs early and ensure code quality.
  • Set up CI/CD pipelines to automatically test updates and deploy code changes, ensuring that new code integrates smoothly with the existing codebase.
  • Design the codebase with modularity in mind, promoting separation of concerns and making it easier to manage, test, and update individual components.
  • Implement backup and recovery strategies to protect the codebase against data loss and corruption.

A well-maintained codebase reduces the risk of bugs and vulnerabilities, making the product more secure against attacks. It also facilitates easier updates and feature additions, enhancing the product's longevity and adaptability. Ensuring codebase integrity supports collaborative development by providing a clear and organized structure, ultimately leading to a more efficient and high-quality development process.

Examples of good and bad UX design 

Just like fashion, everyone has their own taste in product design. However, when it comes to UX, there are fundamental principles that must be followed, such as those outlined in our QA checklist above.

To illustrate this, we have written examples of good and bad UX design, taking into account standards compliance, accessibility, responsive design, performance, security, and codebase integrity.

QA process checklist Good UX design example Bad UX design example

Standards compliance
The website complies with modern web standards, using up-to-date HTML5, CSS3, and JavaScript. This ensures compatibility with all major browsers and a wide range of devices. The website uses outdated HTML and CSS practices, which do not comply with modern web standards. This can lead to compatibility issues with current browsers and accessibility tools.
Accessibility The website supports screen readers, keyboard navigation, high contrast ratio, and scalable text for users with disabilities. Images on the site have descriptive alt text, aiding users who rely on screen readers. The website lacks proper screen reader compatibility, keyboard navigation, and small font sizes, making it difficult for users with disabilities to access the content.
Responsive design The website offers a consistent and optimized experience across desktops, tablets, and smartphones. It uses a flexible grid system and media queries to adjust the layout based on the device's screen size. The website does not adapt well to different screen sizes. On mobile devices, the layout does not adjust appropriately, leading to a poor user experience.
Performance The website employs lazy loading, minified CSS and JavaScript, and uses a CDN to distribute content globally, ensuring fast and reliable access for users around the world. The website has minimal optimization for loading speed. It uses large, unoptimized images and outdated code that can slow down the user experience, especially on slower internet connections.
Security The website uses HTTPS for secure data transmission and multi-factor authentication (MFA) to protect user accounts. The website’s owner regularly conducts security testing. The website does not use HTTPS, which is a basic requirement for modern web security. This means data transmitted between the user and the site is not encrypted, posing security risks, including data interception and unauthorized access.
Codebase Integrity The website uses modern frameworks, version control, continuous integration and deployment pipelines to ensure that new features and bug fixes are thoroughly tested and deployed smoothly without disrupting the user experience.
The site is regularly updated to incorporate new features, security patches, and improvements, keeping it current with evolving user needs and technological advancements.
The HTML and CSS are disorganized, with inline styles and non-semantic tags, making the code difficult to maintain and update. The site does not use modern development best practices such as modular CSS, JavaScript frameworks, or version control, which can help maintain code quality and integrity.

The bottom line

One of the biggest challenges in UX design is managing stakeholders' expectations. Everyone desires beautifully designed digital products that meet all needs while maintaining just the right amount of information—not too cluttered and not too sparse. When searching for this product online, we expect it to appear immediately. We aim to generate significant revenue from our services within this product while offering free features, because this is what attracts users first. However, the reality of technology and design doesn't always align with these idealistic expectations.

Take Airbnb, for example. Despite being celebrated as one of the greatest examples of UX design, its website scores only 31-37 out of 100 on Google PageSpeed Insights test, which is quite low for such a well-resourced company. This highlights the constant balancing act between meeting user desires and providing the best possible experience within technological and resource constraints.

Ultimately, no product can achieve the highest possible score on all QA tests. It simply isn't feasible. As a digital product creator, your primary task is to understand your QA checklist, stay aware of the ever-changing technological landscape, and strive to achieve the best possible scores with the resources available.

Need help?

The QA checklist can be extensive and complex. If you need assistance, we are here to help. Being in the software QA business for over a decade now—taking care of the QA checklist is kind of our strong suit.

Book a meeting with us today, and let's collaborate to ensure your product achieves the highest possible scores on all QA tests.

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