- For a given program, while common sense verification is possible,
strict verification of a model is intractable, very much similar to
the proof of correctness of a program.
- Validation is a process of comparing the model and its behavior to
the real system and its behavior.
- Calibration is the iterative process of comparing the model
with real system, revising the model if necessary, comparing again, until
a model is accepted (validated).
- Three-step approach in the validation process.
- Build a model that has high face validity.
- Validate model assumptions
- Compare the model input-output transformations to corresponding input-output transformation for the real system.

- Face Validity
- Validation of Model Assumptions
- Validating Input-Output Transformations
- Input-Output Validation: Using Historical Input Data

Meng Xiannong 2002-10-18