A scale model is most generally a physical representation of an object, which maintains accurate relationships between all important aspects of the model, although absolute values of the original properties need not be preserved.
Scale models are used in many fields including engineering, architecture, film making, military command, salesmanship, and hobby model building. While each field may use a scale model for a different purpose, all scale models are based on the same principles and must meet the same general requirements to be functional. The detail requirements vary depending on the needs of the modeller.
To be a true scale model, all relevant aspects must be accurately modeled, such as material properties, so the model’s interaction with the outside world is reliably related to the original object’s interaction with the real world.