Wednesday, 25 June 2025

Shift Left and Shift Right Testing

There is always a debate which kind of approach is better for defect free (Early Detection) applications and its never ending.

One of the debates in recent times is about Shifting the focus from right to left, but is it really left is right?

How do we decide which is right approach (there is no way to follow single approach and say its right) but we can discuss and take in some of the concepts from each approach and follow it.

In this tiny blog we will comprehend what is shift left and shift right testing, its benefits and compare. 

What is Shift Left testing:

Shift Left Testing is typically carried out earlier in the software and system development lifecycle. It helps identify potential issues and bugs before they can become significant issues. It enables the team to spend less time debugging and more time concentrating on features and functionality. Shift-left testing averts all adverse effects that late testing could have, such as insufficient testing resources, undetected design, architecture, and requirement flaws, debugging challenges and problem resolution, and project delays. There are four ways to move tests to earlier stages of the software development cycle. These include model-based shift-left testing, traditional shift-left testing, incremental shift-left testing, and Agile/DevOps shift-left testing.

Benefits of Shift Left Testing:
The shorter feedback loops built into shift-left processes empower us in several ways. Defects can be found faster, fixes can be applied more efficiently, and lessons learned in one iteration can be applied in the next, to name a few
Early Detection of IssuesBy introducing testing and security checks early in the lifecycle, vulnerabilities are detected sooner, reducing the overall cost of fixing them.
Improved Collaboration: BDD fosters collaboration between developers, testers, and business analysts, ensuring security and functional requirements are well-defined.
Faster Delivery with Quality: Shift-Left improves quality while reducing development time, allowing for rapid yet secure code delivery.
Continuous Improvement: By integrating security at each step, organizations create a culture of continuous improvement, ensuring that software is secure, reliable, and aligned with best practices.
Whatever project management methodology or release cadence your team has, you can benefit from the shorter verification feedback loops from shift-left testing.


What is Shift Right Testing:

Shift right testing, also known as testing in production, focuses on conducting testing activities after the development process. It involves gathering insights from real user feedback and interactions after the software has been deployed. Developers then use those insights to improve software quality and come up with new feature ideas.

Benefits Of Shift Right Testing:
Real-time Feedbackthe sole purpose of shift right testing is to test with real data for real results instead of using simulated data. This brings back authentic feedback and even helps to uncover valuable insights on user preferences.
Improved User Experiencethe insights brought back from shift right testing sessions is translated into technical improvements for the software and boosts its business value. Going beyond just fixing “bugs”, now the dev team can also optimize certain features to bring users a better experience.
Continuous Improvementthe shift right approach encourages continuous testing and learning about the software, knowing that there is always room for optimization for the software as more and more features are added. Over time, these insights can even be “consolidated” into principles about the software and the business itself, serving as reference for strategy development.


Shift-left vs Shift-right:

When It Happens

Early stages of software development life cycle

Post-production, in the live environment

Objective

Early bug detection and prevention

Real-time monitoring and user feedback for improvements

Activities

Static code analysis, unit testing, code reviews

User acceptance testing, monitoring, feedback analysis

Emphasis

Prevention-oriented

Improvement-oriented

Test Environments

Development and testing environments

Production Environment

Collaboration

Developers, testers, QA teams

Developers, testers, operations, customer support

Iterative Approach

Yes

Yes


Conclusion:
By implementing both Shift Left and Shift Right Testing, organizations can achieve better collaboration between developers, testers, and operations teams, ultimately delivering a superior user experience.


Reference Links:


No comments:

Post a Comment