Top 8 Key Metrics for Test Automation
Nowadays, to maintain software quality in the fast-paced Agile development environment, many companies have invested in adopting test automation during their development process. However, the automation testing investment can be a waste if they cannot ensure the efficacy of this method.
Thus, before diving into the testing phase, businesses should carefully evaluate test automation metrics and KPIs to ensure the automation return on investment (ROI) and understand the defective testing part for immediate adjustment.
Here’re some quality metrics you could consider putting into place to evaluate and ensure the test automation process delivers value.
Benefits of Automation Testing Metrics
DevOps and TestOps management is dependent upon test automation metrics. As it’s difficult to effectively manage a dynamic DevOps environment without a comprehensive understanding of what is occurring at a granular level, the appropriate metrics must be monitored. Additionally, tracking test automation data can benefit businesses in sourcing and acquiring test automation tools.
Here are reasons that you should analyze test automation metrics at the beginning:
- Real-time Visibility: these metrics will provide accurate insights regarding the testing process, including the number of testing cases in progress, error discovery, and automation execution time.
- Automation Effectiveness: performance metrics can be used to evaluate whether the automation testing can improve your app quality or if your team is just spinning its wheel. Moreover, it also indicates where testers should concentrate more during the development process to improve the testing effectiveness.
- Boosted Time to Market: the automation testing metrics will help you evaluate test duration and, from that, have an appropriate strategy to speed up the process.
How to Choose the Right Testing Metric?
The appropriate set of automation testing metrics varies on the particular business and team’s objectives. However, it’s crucial to choose a metric that calculates the automation value, especially on your first time implementing an automated testing approach. Some key considerations when selecting automation testing metrics include:
- Connecting with corporate objectives: Any automation statistics utilized by the company must reflect the primary goals that it is striving for. For instance, a business that focuses on delivering software on time may consider using parameters that help identify test progress to be matched against success criteria.
- Improving the QA team’s performance incrementally: The chosen metrics should enable the organization to filter out ineffectiveness and improve over time. To evaluate progress, the metric should be based on an established baseline.
- Providing value to business strategy: A metric that you select should be useful in mapping the company’s overall strategy. It should not only provide a baseline signal but also encourage the team to develop a plan and work on it to ensure testing efficiency.
8 Key Test Automation Metrics for Agile Testing
There’s a plethora of metrics that provide you with a deeper understanding of the QA system, team’s testing skills, and process to identify and fix issues while boosting your team’s productivity. The following list of commonly-used metrics will help you improve the automation testing process:
1. Percentage of Automatable Test Cases
At the beginning of software testing, businesses can measure the percentage of test cases that are automatable concerning the total number of test cases in a suite. This parameter is used to determine which processes are prioritizing automation and which still demand human validations.
It’s helpful in formulating the appropriate testing strategy and generating a balance between automated and manual testing.
Automatable Test Cases % = (# of test cases automatable / # of total test cases) * 100
2. Automation Test Coverage
Test coverage is a black-box approach that tracks the number of test cases performed. In automated testing, this metric illustrates the percentage of test coverage achieved automatically compared to those done manually. This helps you track whether the QA team is meeting the automated test coverage goal, or vice versa, increasing each sprint duration.
For example, Visual Testing, often known as visual UI testing, ensures that the software's user interface (UI) displays appropriately to all its end-users. With the assistance of automation testing tools such as Katalon’s AI-Driven Visual Testing, the number of automated test cases done has increased, resulting in higher automation test coverage.
Automation Test Coverage % = (# of automated tests / # of total tests) *100
3. Automation Progress
This metric refers to the number of automated test cases that have been executed at a given time to track how well you’re doing in response to the objective of automated software testing.
Through this parameter, you can identify whether there are any significant deviations during the automation testing process. Reasons for these deviations include tasks being put on hold due to higher priorities, unforeseen elements in the software, or the inability to execute tester efforts effectively.
Automation Progress % = (# of actual test cases automated / # of tests cases automatable) * 100
4. Defect Density
These KPIs measure total known issues, bugs, and errors discovered in software or other parts over the period of a development cycle. To understand whether your automation is running high-value test cases - look at the number of defects. It is extremely vital in Software Development Life Cycle (SDLC).
The number of defects encountered enables you to decide if the software is ready to be released. As this metric concentrates on the number of flaws detected, it allows QA engineers to identify the weak parts of software that require rigorous testing. The high parameter also reveals that the developing phase has coding difficulties and needs more resources or training.
Defect Density = (# of known defects / total size of system) *100
5. Automation Script Effectiveness
Regression testing is often the focus of this measure. It evaluates defects found through practical automation testing compared to the overall number of acceptable defects in a project’s test management system.
It's beneficial in figuring out what kinds of flaws the scripts can't find and how different testing environments, such as integration and staging, can impact the script's efficiency. For instance, in your staging environment, significant defects are found as you’re typically concentrated on regression testing.
Automation Script Effectiveness = (# of defects detected by automation / # of acceptable defects) * 100
6. In-sprint Automation
Do you keep track of how much automation has been accomplished throughout the sprint? And what percentage is then chosen by the automation testing team members? This metric will assist you in understanding how close you are to in-sprint automation and improve the quality of several root causes.
This comprises quality of backlog grooming, automation framework design, and stability of use cases in the sprint. To be most effective, the QA team should aim to automate new work in the iteration the work is finished rather than in a subsequent sprint.
In-Sprint Automation % = (# of scripts created in-sprint / # of scripts created post-sprint) * 100
7. Build Stability
If automation testing has been integrated into a CI/CD pipeline, this parameter can be leveraged to measure the tests’ effectiveness by calculating the percentage of shattered builds to stable ones. Testing for robustness and scalability will help determine whether a stable build can be deployed to production.
Build Stability % = (# of build failures / # of builds) * 100
8. Automated Test Pass Percentage
This more straightforward metric measures how many automation tests have passed. In automation testing, it’s used to understand the stability of your automation suite as well as its effectiveness. Having a low failure rate indicates that the script logic is correct, while a low pass rate requires more time spent validating failures. In case there are false failures, that is an early warning sign that your automation suite isn't trustworthy.
However, the disadvantage of this metric is that it cannot show the quality of those tests. For instance, a test might pass as it only checks an unimportant condition or due to an error in the test code, while the software itself is not working as desired.
Automated Test Pass Rate % = (# of cases that passed / # of test cases executed) * 100
On a Closing Note
Since many businesses have set up comprehensive automation test suites to expedite their testing process, choosing the right automation testing tools and considering useful testing metrics are worth considering. The positive rate in such metrics shows that your testing progress is on the right track, which can be the consequence of having appropriate skills among team members and the effectiveness of testing scripts and frameworks.
The faster testing process requires more thorough testing metrics, which help not only the QA team identify bugs promptly but also the development team to fix bugs and have appropriate adjustments, resulting in more qualified apps.
In KMS Solutions, we concentrate on providing the best testing process by having skillful QA engineers in the team and choosing the appropriate metrics to deliver the qualified software at a timely manner.