Last updated on June 24th, 2025 at 12:23 pm
This guide will help you understand the Waterfall Model as described by ISTQB. You’ll learn each phase of the model—from requirements to maintenance—and how this linear approach is applied in traditional software development.
Now we will understand each level of waterfall model.
- If Product or application will have small time period to develop.
- When requirement is clear and will not be changed frequently.
- Tool and technology which will be used for application should not be changed frequently.
- As document is well define here in requirement phase, this would be the best thing to maintain the application.
- Mostly used for small product or application
- Quality will be given if entry and exit criteria will be well define.
- Not work for Log term product.
- If any changed will be required after development phase and it will be identified in testing phase of application then it won’t be accepted in this model.
- Complex project will not proceed with this model as risk factor will be high with this.

Hi, I’m Aravind — a seasoned Automation Test Engineer with over 17 years of hands-on experience in the software testing industry. I specialize in tech troubleshooting and tools like Selenium, Playwright, Appium, JMeter, and Excel automation. Through this blog, I share practical tutorials, expert tips, and real-world insights to help testers and developers improve their automation skills.In addition to software testing, I also explore tech trends and user-focused topics, including Snapchat guides, codeless test automation, and more.