Advantages

• Expensive prototypes or full size mock-ups don’t need to be built
• No equipment is damaged
• People are not put in any danger
• Modifications can be made easily and re-tested quickly

Disadvantages

• The results depend on how good the model is — a poor model will give unreliable results
• Simulations can’t completely re-create the pressures that a person might be under in a real-life situation