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What Is The Difference Between Manual Testing Vs. Automated Testing?

HomeTechnologyWhat Is The Difference Between Manual Testing Vs. Automated Testing?

Software testing plays a pivotal role in the software development lifecycle, ensuring code quality and uncovering bugs before release. Organizations often face the choice between manual testing and automated software testing services, or even a combination of both, when it comes to validating software projects.

In this comprehensive guide, we will explore the key distinctions between manual and automated testing approaches, offering insights into their pros and cons and their respective use cases. This knowledge is crucial for organizations to formulate an effective testing strategy.

Manual Testing:

Manual testing is a hands-on process where testers interact with the application under test directly, without the use of scripts or automation tools. Testers navigate the software’s user interface, executing test cases step-by-step. Manual testing has its advantages, such as evaluating real-world software usage, allowing for exploration beyond scripted scenarios, providing nuanced feedback on UI/UX, being suitable for testing complex edge cases, and fostering broader domain knowledge through direct interaction. However, it also has drawbacks, including time-intensive test execution, limitations in test coverage, inconsistency across testing cycles, susceptibility to human error, and challenges in tracing and documenting results, especially for large, complex test suites.

Automated Software Testing Services:

Automated software testing services rely on specialized tools to automatically run pre-scripted tests on the software. Test engineers create test scripts that emulate user interactions, which are then executed by testing frameworks. Automated testing offers advantages like broad and consistent test coverage, faster test cycles that enhance efficiency, scalability for testing large suites without human effort, integration with CI/CD pipelines for continuous delivery, overcoming limitations of manual testing, and long-term cost savings.

However, it also comes with certain limitations, including a high upfront investment to build testing frameworks, challenges in scripting and maintenance, the potential to miss edge cases if not explicitly scripted, occasional flakiness leading to false test failures, the need for continuous monitoring during test execution, and the requirement for technical expertise in script development.

Comparing Test Practices:

Beyond the high-level differences, manual and automated testing practices diverge in several key aspects:

Planning: Manual testing tends to be exploratory and adaptable, while automated testing requires meticulous test plans mapped to specific requirements.

Scripting: Manual testing does not require scripts, whereas automated testing relies on coded test scripts to drive the testing process.

Test Data: Manual testers can create test data dynamically, while automated testing requires predefined data sets.

Defect Logging: Manual testers manually log issues during testing, while automated testing automatically logs results.

Environment: Manual testing utilizes production-identical test environments, while automated testing necessitates controlled test environments.

Execution: Manual testing is performed manually in real-time, while automated tests execute independently based on predefined schedules.

Reporting: Manual testing often relies on informal reporting mechanisms, while automated testing offers detailed analytics and visual reporting.

Choosing When To Use Manual Testing:

Manual testing is particularly suited for scenarios that require human intuition, subjective feedback, and real-time interaction with the software. Here are situations where manual testing is beneficial:

User Experience Testing: Evaluating software usability and user experience benefits from human testers who can provide subjective feedback on design nuances.

Exploratory Testing: Testing edge cases and unpredictable usage patterns relies on human intuition and improvisation, which exceed the capabilities of scripted automation.

Initial Phase Testing: Manual testing helps testers become familiar with the application’s behavior during early development when the software is still evolving.

Simple Interfaces: Applications with basic user interfaces and workflows may not justify the overhead of automation.

New Feature Testing: Manual testing allows testers to interactively experiment with new features without the initial scripting effort.

Economic Constraints: Organizations with limited budgets may initially rely on cost-effective manual testing.

Training and Transition: Testing teams new to automation should maintain some manual testing to build knowledge and experience.

Determining When To Use Automated Testing:

Automated testing excels in situations that involve repetitive tests, regression testing, cross-browser testing, performance testing, CI/CD integration, safety-critical systems, data validation, and accessibility testing. Here are scenarios where automated testing is advantageous:

Repeatable Test Cases: High-volume repetitive tests are ideal for automation, reducing tedious manual effort.

Regression Testing: Thoroughly revalidating software changes demands extensive automation to ensure all functionalities work as expected.

Multi-Browser Testing: Testing across diverse browsers and devices necessitates automation to achieve comprehensive coverage.

Performance Testing: Automation facilitates running intensive load, stress, and scalability testing at scale.

Safety-Critical Systems: Rigorous and reliable testing of systems like medical devices requires automation to ensure safety and reliability.

Data Validation: Automating database and API testing provides efficient data integrity validation.

Accessibility Testing: Automated tools can efficiently run accessibility testing across many UI elements and code paths.

Ideally, test automation should cover the majority of functional validation, allowing manual testers to focus on high-value testing.

Best Practices For Implementation:

To fully leverage the benefits and mitigate the limitations of both manual and automated testing services, organizations should follow these best practices:

Build a Balanced Strategy: Develop a testing strategy that combines manual exploratory testing with automated regression testing to ensure comprehensive validation.

Phase in Automation: When dealing with complex applications initially tested manually, introduce automation gradually to minimize disruption.

Focus on Repetitive Tests: Prioritize automation for repetitive and frequent test cases to achieve efficiency gains.

Continuous Expansion: As the application matures, continuously expand automation coverage to encompass more test cases and scenarios.

Retain Manual Testing: Continue to use manual testing to verify new features, assess user experience, and explore edge cases where automation may not be effective.

Test-Friendly Code: Encourage developers to write test-friendly code that facilitates automation, making scripts easier to develop and maintain.

Track ROI: Monitor the return on investment (ROI) of test automation to ensure it aligns with organizational goals and cost-efficiency.

Celebrate Success: Promote testing successes across the organization to highlight the value of quality assurance and testing efforts.


This comprehensive guide has shed light on the distinctions between manual and automated testing and how they complement each other. By understanding the strengths and weaknesses of both approaches, organizations can formulate an effective testing strategy tailored to their specific needs, available resources, and use cases.

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Divyesh Aegis
Divyesh Aegis
Divyesh Aegis is a senior writer and working with Aegis Softtech – leading mobile and web development companies in the USA. You can contact him in order to hire digital marketing to avail of the highly functional mobile and web development solutions. He has several years of experience in the field of SEO.


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