Differentiate between verification and validation. Discuss the most objective and scientific means of validation
Verification refers to the process of determining if a simulation program performs as intended. In other words, has the conceptual model been correctly translated into a working simulation program? Is the computer implementation free from logical errors and bugs?
Validation is concerned with determining whether the conceptual model is an accurate representation of the real system under investigation.
The most objective and scientific means of validation is to compare the output of a model with data from the real system for the same inputs. The idea is to match as closely as possible the inputs used in the real system and the inputs used in the model. The system outputs should closely approximate the model outputs. One should always remember that a real system con-stantly changes; thus, validation is never really finished. Data need to be periodically updated and the model needs to be retested.
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