Software Quality Assurance: A Guide

What is software quality assurance?

Software Quality Assurance (SQA) refers to a set of processes and practices that companies use to ensure the quality of their digital products. The process is crucial for detecting defects, bugs, and issues with the user experience, and ensuring that the software meets the company's goals and users' needs.

The entire goal of SQA is to ensure the quality of software before it hits the market. These processes are also commonly used to consistently improve digital products, allowing the software to keep up with the times.

Importance

The modern digital landscape is highly competitive and it's on development teams to ensure that they keep up with the times. It's easy for software to become outdated or for simple errors to affect the entire user experience. This is why companies need to have a proper quality assurance process that allows them to detect any errors and ensure that their software always performs according to customer requirements.

A structured SQA process helps teams stay ahead of these risks and delivers value across three core areas:

• Customer and user experience — Software must consistently meet user needs to become a trusted, everyday tool. Products that work as advertised are far more likely to retain existing users and attract new ones.

• Business profitability — Reliable software builds customer confidence and supports long-term revenue growth. Teams that ship quality products spend less time on reactive support and more time on value-added work.

• Development cost — When bugs make it through to the final product, fixing the issue can be very costly — NIST research has consistently found that defects caught late in the development cycle require significantly more effort to resolve than those identified during planning or design.

What are the types of software quality assurance?

SQA covers a broad range of testing approaches. Understanding the different types helps QA teams design a strategy that addresses both functional performance and broader quality attributes.

• Functional testing verifies that the software behaves according to its defined requirements. It checks that specific features — login flows, data processing, user actions — work as expected, and is typically the first layer of any QA strategy.

• Non-functional testing evaluates how the software performs under real-world conditions, rather than just whether it works. This includes performance testing (speed and load handling), security testing, usability testing, and compatibility testing across devices and operating systems.

• Static testing reviews code, documentation, and design without running the software. Techniques include code reviews, walkthroughs, and static analysis tools. Because defects are caught before execution, static testing is one of the most cost-effective forms of QA.

• Dynamic testing involves running the software to observe its behaviour in real time. This includes both manual and automated test execution and forms the foundation of most test execution phases in the SDLC.

How does the software QA process work?

SQA isn't a single checkpoint at the end of development — it's an ongoing process that runs in parallel with the Software Development Life Cycle (SDLC). Each phase of development has a corresponding QA activity designed to catch issues as early as possible.

1. Requirements review — QA involvement begins before a single line of code is written. QA engineers review specifications for ambiguity, missing requirements, and potential quality risks. Catching issues at this stage is the least costly form of defect prevention.

2. Test planning — Once requirements are finalised, QA teams define the test strategy: what will be tested, how, by whom, and on what timeline. This includes selecting the testing types required (functional, performance, security) and identifying the tools and environments needed.

3. Test design and case development — QA engineers create detailed test cases that map directly to requirements, defining clear inputs, expected outputs, and acceptance criteria. These form the basis for repeatable, auditable testing throughout the project.

4. Test execution — Tests are run against each build or release candidate. Defects are logged, assigned to developers, and tracked through to resolution. Manual and automated testing typically run in parallel at this stage.

5. Defect tracking and reporting — Every defect is logged with severity, priority, and status. QA teams produce regular reports — defect density, open and closed rates, escape rate — to give stakeholders visibility into software quality at any point in the cycle.

6. Sign-off and release — Before release, QA teams conduct final regression testing to confirm that resolved defects haven't introduced new issues. Once sign-off criteria are met, the build is cleared for deployment.

Platforms like Mitti (by SafetyCulture) provide comprehensive and customizable checklists to make the software QA process run smoothly. It’s designed to document findings easily and provide seamless digital sharing across teams so that everyone stays on the same page.

Key principles of software quality assurance

Every company must develop a customized SQA system that helps them ensure their products meet the company's unique standards. Developing a proper SQA system can take some trial and error, but it's essential to put in the effort to maintain the quality of your software.

That said, the principles and aspects to consider in any SQA system include the following:

Test planning and documentation

Every functional SQA system is built on solid test planning and documentation — an approach formally outlined by NIST as essential to repeatable, transparent quality assurance processes. Before anything, it's important to clearly define the goals and objectives of your software.

This is where you can lay out the full scope of your project, including potential issues that could affect the user experience. Proper documentation also ensures transparency, which helps maintain repeatability in quality control.

Test coverage and automation

This refers to how much or the extent to which you test your software's capabilities. It's important to have maximum test coverage when working on SQA to ensure that you capture any potential issues and fix any bugs. Since many of these tests are repetitive, your team can also figure out ways to automate various aspects of the testing process to make things easier for the organization.

Continuous testing

Another key principle of SQA is continuous testing. A single passing test doesn't guarantee long-term performance — which is why NIST's guidelines for developer verification recommend automated testing at every stage of development to maintain consistent quality and minimize the risk of defects slipping through. When practicing SQA, continuously test your products for quality and performance to gauge when it's time for maintenance, updates, or improvements.

Defect management and tracking

Since SQA is designed to help improve the user experience, it also involves identifying, tracking, and managing defects. These problems are unavoidable when developing software, so the team must anticipate and understand their nature and track how the developers respond to them. When you do this, it is much easier to leave no stone unturned.

Continuous learning and improvement

Lastly, you always have to work to improve your app and constantly learn how to optimize the user experience. Accomplish this by implementing new technology, listening to customer feedback, or regularly updating your code.

Since the digital landscape is constantly changing, and you will need a high-quality SQA system that focuses on continuous improvement to keep your app at the top of the game.