3. Ensuring Your Model is Correct
This section defines the two most important quality checks in simulation: Verification and Validation.
3.1 Verification
Verification is the process of ensuring that the simulation program or software is built correctly according to its design specifications. It’s about checking for accuracy and consistency between the developer’s conceptual plan and the final, implemented model.
The key question verification answers is: “Are we building the model right?”
3.2 Validation
Validation is the process of determining whether the model is an accurate representation of the real-world system. It involves comparing the model’s results with data from the actual system to see if they match within an acceptable range.
The key question validation answers is: “Are we building the right model?”
3.3 Verification vs. Validation at a Glance
| Concept | Key Question Answered |
| Verification | “Are we building the model right?” (Does the program match the design?) |
| Validation | “Are we building the right model?” (Does the model match reality?) |
Now that you know how to check a model’s quality, let’s explore the different types of systems and simulations you might encounter.