A Comparative Analysis of Scripted Testing (Vs) Unscripted Testing

Article Context:

1. Scripted Testing
2. UnScripted Testing
3. Scripted (vs) UnScripted Testing

Introduction:

Computer Software Validation (CSV) is a critical process to set desired requirements and capture a snapshot of the software’s functionality as intended through validation deliverables and testing. As part of CSV process, there are two known primary approaches to software testing, scripted and unscripted testing. The scripted testing is well known to be a traditional approach where it utilizes upfront planning with rigid structure, similar to waterfall methodology in project management. Whereas the newly introduced “unscripted testing” approach provides flexibility and unique testing method through critical thinking to verify software with less documentation and more testing.

Scripted Testing:

Scripted testing involves meticulous preparation and organization of the software/application specifics. Test scripts, consisting of guidelines, stages, and procedures, are created to facilitate the testing process upfront before execution of test scripts. It takes time and effort to create the “step-by-step” manual to the tester to deliver thorough coverage and reproducibility in each test case. One of the disadvantages of this methodology is that it is a time and money consuming process. The nature of scripted testing requires validation personnel to explore, test, and write specific scenarios into test script and have tester to recreate described scenarios on each step at a time. Also, heavily scripted test sometimes may or may not be relevant to real life scenarios, causing blind spots to the testing process. Organizations wanting a lean process may critique this approach as repetitive or provide negative feedback on slow turnaround time of the validation process. However, the benefit of scripted testing approach is that when it is properly carried out, it makes it easy to develop automated testing as it has been rigorously planned upfront with expected outcomes. Automated testing also would help in facilitating the tracking of application’s progress and location where it has been tested with proper setup.

Unscripted Testing:

On the other hand, unscripted testing provides testers with the freedom to choose testing approaches based on their expertise and knowledge. This approach relies on the tester's critical thinking and creativity to evaluate the software/application, similar to agile methodology. The advantage of unscripted testing is that this approach reduces validation turnaround time along with cost saving by reducing the need for extensive documentation of building scripts, correcting scripts, and repetitive effort of recreating scenarios by multiple people. It also allows for a deeper exploration of the software's functionality, facilitating the identification of unexpected issues and providing valuable insights. However, unscripted testing requires skilled testers and may lack the structured and reproducible nature of scripted testing. A common misconception is that unscripted testing is undocumented. This is simply not true.

Differences between Scripted Testing and Unscripted Testing:

Scripted testing involves detailed test scripts with specific steps, whereas unscripted testing provides testers with flexibility and the freedom to choose their approaches. Scripted testing ensures reproducibility and structured coverage, making it suitable for critical functionality and large testing teams. Unscripted testing, on the other hand, is ideal for complex and innovative projects that require adaptability and the exploration of real-world scenarios. Combining both approaches can provide a balanced testing strategy, leveraging the strengths of each.

Considerations for Testing:

The quality of requirements plays corner stone in successful testing. Inadequate or inaccurate requirements often lead to testing issues. It is essential to prioritize risk and select the most effective testing approach accordingly. Over-testing, driven by a desire to "test everything," can strain resources and compromise product quality, patient safety, and data integrity by overlooking high-risk over low-risk items. The FDA Computer Software Assurance method emphasizes risk-based critical thinking over rigorous testing and encourages the use of automated technology for digital validation and unscripted testing techniques.

Conclusion:

In conclusion, the choice between scripted testing and unscripted testing depends on project requirements, risk considerations, and the nature of software/application being tested. Scripted testing offers structure, regression testing capabilities, and consistent coverage, while unscripted testing promotes flexibility, creative thinking, and deeper exploration. A combination of both approaches, tailored to the specific needs of the project, is often the best practice. At Compliance Group Inc., our expert team understands the importance of customized testing strategies and can provide comprehensive solutions to ensure the quality and reliability of your software/application. Whether you require scripted, unscripted testing, or a combination of both, we are committed to delivering excellence in software validation.

To learn how to improve your new or existing testing strategy, contact us at sales@complianceg.com