Gerência e Qualidade de Software - Aula 05 - Verificação e Validação

Summary

This video explores the vital processes of verification and validation (VV) in software development. These processes ensure the quality of software by verifying if it meets specified requirements and validating if it addresses stakeholder needs. It contrasts static and dynamic analysis methods, such as code reviews and testing. The video also highlights practical approaches used by a real-world software development company, Cobra Tecnologia, to maintain high software quality through continuous integration, automated testing, and close client collaboration. Ultimately, it emphasizes the importance of frequent verification and validation for delivering reliable software.

Takeaways

• 😀 Verification and Validation (VV) are essential processes in software development that ensure product quality and adherence to requirements.
• 😀 Verification involves checking if the product adheres to the specified requirements, while validation ensures the product meets the user's needs in its intended environment.
• 😀 Static analysis (e.g., code reviews) is used in verification, while dynamic analysis (e.g., testing) is used in validation.
• 😀 Verification can be done through various methods such as code reviews, continuous integration, and static code analysis tools.
• 😀 Validation requires user involvement to ensure that the product meets their expectations, and it is often done through prototypes, simulations, or user testing.
• 😀 In agile software development, frequent iterations and feedback from the client are key to validating if the product is fulfilling its intended purpose.
• 😀 Using automated tests, including unit tests and integration tests, is a crucial part of verification in the software development process.
• 😀 Code reviews should involve multiple team members, promoting collaboration and reducing the chance of errors.
• 😀 Static code analysis tools help identify potential issues in code quality by checking for consistency with coding standards.
• 😀 Both verification and validation need to be carried out frequently to ensure high software quality and satisfaction of stakeholder needs.
• 😀 In addition to testing and reviews, the use of design frames, mock-ups, and early feedback from clients helps in validating the software early in the development process.

Q & A

What are the main processes discussed in the transcript?

The main processes discussed are verification and validation, which are essential for software development. These processes are used to ensure the quality of software and can be applied through various methods like static or dynamic analysis, and testing.

What is the difference between verification and validation?

Verification ensures that the software meets the specified requirements and standards. It checks whether the product is built correctly. On the other hand, validation ensures that the software fulfills the actual needs of the stakeholders and operates as intended in its real-world environment.

How does verification differ from validation in terms of their objectives?

Verification focuses on whether the software is being built according to the specifications. Validation, however, focuses on whether the right software is being built to meet user needs and expectations.

What types of analysis are used in the verification process?

Verification can be performed using static analysis, which doesn't involve executing the software, such as through reviews and audits. It can also include dynamic analysis, which involves executing the software, such as during testing phases to check if the product behaves as expected.

What is an example of a static analysis technique used in software development?

An example of a static analysis technique is code review, where team members review the code to check for adherence to coding standards, and detect possible issues or defects in the code before it's executed.

What tools are commonly used for code analysis in verification?

Common tools used for static code analysis include linters and format checkers, which help ensure adherence to coding conventions. For dynamic analysis, testing frameworks like JUnit, Jasmine, or Robocop are often used to verify code functionality through automated tests.

How does validation contribute to ensuring software quality?

Validation ensures that the software meets the needs and expectations of the end users. It involves activities such as user feedback, prototyping, and acceptance testing, which help verify that the product is useful and satisfies the stakeholders' requirements.

How do prototypes contribute to the validation process?

Prototypes help in the validation process by providing a tangible early version of the software that can be shown to users for feedback. This allows stakeholders to evaluate the software's functionality and usability before it is fully developed.

What role does continuous integration play in verification?

Continuous integration (CI) plays a role in verification by automatically integrating and testing new code changes as they are made. This process helps ensure that the codebase remains stable and functional, and it provides an opportunity for early detection of issues.

How does the company Cobra Tecnologia ensure software quality through verification and validation?

Cobra Tecnologia uses various verification practices, such as code reviews and automated testing at different levels (unit tests, integration tests). They also employ validation practices like prototyping and regular feedback cycles with clients to ensure the software meets user expectations and requirements.