Introduction
The software industry is experiencing unprecedented growth, driven by digital transformation. Software quality has thus become a strategic imperative.
The 15th World Quality Report underscores this shift, highlighting the growing emphasis on quality engineering and its integration into core business operations.
With a focus on delivering value rather than volume, 67% of companies are prioritizing quality assurance (QA) as a cornerstone of their operations.
To thrive in today’s quality-first software landscape, a lot comes down to setting the right benchmarks for measuring success.
In this blog, we take a deep-dive to bring you up to speed with the software quality metrics that you should essentially measure – and the critical need for Quality Gap Intelligence to maximize your end-to-end SDLC potential.
The 3 Cs of Software Quality
The three core dimensions of software quality are:
Strategies to Improve Software Quality
To achieve optimal software quality, organizations must adopt a holistic approach that incorporates the following strategies:
Pro Tip: To achieve a truly holistic view of software quality, it’s essential to embed quality metrics directly within existing development and work management tools. By visualizing quality data alongside development progress, teams can proactively address quality issues from the get-go.
Core Software Quality Metrics You Need to Measure
1. Test Coverage
Pro Tip: Measure test coverage for new or modified code. This targets testing efforts on areas most likely to introduce defects, reducing overall test execution time as well.
2. Defect Density
Pro Tip: By incorporating work item IDs into commit messages, software teams can trace the number of times a file and a line was touched for ‘Bug’ type workitems.
This practice establishes a direct link between code changes and the corresponding defects or user stories, allowing for efficient root cause analysis.
3. Defects per Software Change
Pro Tip: Get defects per change by team, module, developer, reviewer, etc. The best way to ensure traceability is by linking work items to defects on a project, portfolio level.
4. Test Effort and Reliability or Cost per Test
Pro Tip: With Requirement-Test traceability – Measure test effort and test reliability by product modules, key functionalities, by product teams etc.
5. Test Case Effectiveness
Pro Tip: Analyse test case history to understand how often test cases are revised, how often new test cases are added, etc.
6. Defect Leakage
Interestingly, a study by IBM shows that the cost of fixing a defect multiplies as it progresses through the development lifecycle.
The cost to fix a defect is typically around $1.
The cost to fix a defect jumps to over $10.
Fixing a defect after the software is released can cost over $100.
This further emphasizes the critical importance of early defect detection and prevention.
Pro Tip: Analyze historical data to pinpoint areas where defects consistently slip through the testing net. Also, calculate the percentage of defects found in production compared to those discovered in pre-production environments.
7. DORA Metrics
DevOps Research and Assessment (DORA) has established a benchmark for measuring software delivery performance. Its four key metrics – deployment frequency, lead time for changes, change failure rate, and mean time to restore service – provide insights into a team’s speed, stability, and ability to recover from failures.
Pro Tip: Make DORA metrics actionable by tracing lead time for changes, change failure rate and mean time to recover back to assignee, teams, product areas etc. Adjust risk indicators for tests and source code areas depending on history of changes that contributed to increased failure rate.
Advanced metrics you can measure to maximize software quality