What is Software Quality Assurance (SQA)?

Definition of software quality assurance (SQA)

Software quality assurance (SQA) is a systematic, comprehensive process covering all the activities and procedures intended to ensure that the software being developed meets defined quality requirements, standards and the expectations of users and stakeholders. SQA is a proactive approach that focuses not only on detecting defects (which is the domain of quality control – QC, including testing), but above all on preventing them by monitoring and improving the entire software development process.

Goal and scope of SQA

The main goal of SQA is to build confidence that the final product will be of high quality, reliable, secure and compliant with requirements. The scope of SQA activities is broad and covers the entire software development life cycle (SDLC), from requirements gathering through design, coding and testing to deployment and maintenance. SQA focuses on the processes, standards, methodologies and tools used to build software.

The difference between SQA and quality control (QC) / testing

SQA is often confused with quality control (QC) or with testing alone. QC, of which testing is the main part, consists of reactive activities focused on identifying defects in a product that already exists. SQA, by contrast, is a proactive, process-oriented approach. SQA defines the standards and processes that are meant to ensure quality, while QC verifies whether the product meets those standards. In other words, SQA builds quality into the process, and QC checks it in the product. Both are essential and complement each other.

Key SQA activities and processes

SQA activities may include:

Defining quality standards: Setting measurable quality criteria for the product and the process (e.g. relating to performance, security, usability and coding standards).

Process audits: Regular reviews and assessments of software development processes to check their compliance with standards and identify areas for improvement.

Reviews and inspections: Formal and informal reviews of project artefacts such as requirements, design documentation, source code (code review) and test plans.

Software configuration management (SCM): Code version control, change management and building consistent software releases.

Defect management: Putting in place a process for reporting, tracking, prioritising and resolving detected defects.

Risk management: Identifying and assessing risks related to product and process quality, and planning mitigating actions.

Selecting and deploying tools: Choosing and implementing tools that support SQA and QC processes (e.g. test management systems, static code analysis tools).

Training and awareness building: Educating teams on quality standards and good engineering practices.

The role of the SQA team

In some organisations, there is a dedicated SQA team responsible for overseeing and implementing quality assurance processes. Increasingly, however, responsibility for quality is distributed and becomes an integral part of the work of the whole development team (so-called quality assistance), in line with the philosophy that “quality is everyone’s responsibility”. Whatever the structure, it is essential to have clearly defined SQA roles and responsibilities.

Benefits of implementing SQA

A systematic approach to quality assurance brings many benefits: early detection and prevention of defects (which lowers the cost of fixing them), improved software reliability and stability, higher user satisfaction, better risk management, compliance with standards and regulations, and building the company’s reputation as a provider of high-quality solutions.