Verification: What is it? A Simple Guide to the IT Process
Understand the difference between verification and validation. Learn how to check code and documentation to avoid early-stage project errors.
Verification: What is it and why do you need it?
Imagine you are building a house according to an architect's blueprint. Verification is the moment when you check if the wall you just built is exactly the length specified in the plans. You aren't asking if you like the house yet – you are only checking compliance with the instructions.
Verification
How does it work in practice?
Verification is usually static testing. This means you do not have to run the program to verify it. You focus on analyzing what has already been created.
Verification methods:
- Code Reviews - another developer reads your code looking for bugs.
- Inspections - formal meetings to find gaps in documentation.
- Walkthroughs - the author discusses their code with the team.
- Static Analysis - tools checking code for errors without running it.
Verification vs Validation – The Key Difference
This is the most common question in professional exams and job interviews. Although they sound similar, they concern different things.
[Image comparing verification versus validation in software engineering]
| Cecha | Feature | Verification |
|---|---|---|
| Main question | Are we building the product right? | Are we building the right product? |
| Comparison source | Specification and plan | User needs |
| Timing | At every stage (often without running) | Usually at the end (program must work) |
| Example | Checking if code has semicolons | Checking if the 'Buy' button works |
Most common mistakes and pitfalls
Late Verification
Trusting your own code
Pro Tips
Verify small fragments
Example: Code Verification Checklist
Before you send your code to a colleague, check these points:
Quick verification before Code Review
0/5Quiz: Check your knowledge
What is the goal of verification?
Process Diagram (V-Model)
What next?
- Learn more about the Code Review process on GitHub.
- Check out static analysis tools (e.g., SonarQube or ESLint).
- Read about the V-Model in software engineering.
- Practice writing Unit Tests - they are part of the verification process.
- Solve INF.04 exam papers from the testing section.
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